46295 + Interview Questions in Chemistry

1.	Calculate [OH−] of a 0.01 M solution of ammonium hydroxide. The ionization constant for NH4OH (kb)=1.6×10−5 (Take log2=0.30)
Answer» Calculate $[O H^{-}]$ of a 0.01 M solution of ammonium hydroxide. The ionization constant for $N H_{4} O H (k_{b}) = 1.6 \times 10^{- 5}$ (Take $l o g 2 = 0.30$ )

Discussion

2.	Number of equivalent(s) of HI required for a complete reaction with the above compound is/are
Answer» $Number of equivalent(s) of HI$ required for a complete reaction with the above compound is/are

Discussion

3.	List-I contains questions related to the reaction sequence given and List-II contains their answers. Which of the following options has the correct combination considering List-I and List-II?
Answer» List-I contains questions related to the reaction sequence given and List-II contains their answers. Which of the following options has the correct combination considering List-I and List-II?

Discussion

4.	In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) Gases do not liquefy above their critical temperature, even on applying high pressure. Reason (R) Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but R is not the correct explanation of A (c) A is true but R is false (d) A is false but R is true
Answer» In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) Gases do not liquefy above their critical temperature, even on applying high pressure. Reason (R) Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but R is not the correct explanation of A (c) A is true but R is false (d) A is false but R is true

4.

In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) Gases do not liquefy above their critical temperature, even on applying high pressure. Reason (R) Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but R is not the correct explanation of A (c) A is true but R is false (d) A is false but R is true

Answer»

In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question.

Assertion (A) Gases do not liquefy above their critical temperature, even on applying high pressure.

Reason (R) Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not the correct explanation of A

(c) A is true but R is false

(d) A is false but R is true

Discussion

5.	The solubility product of silver bromide is 5.0×10−13 at 298k. Calculate its solubility at this temperature.
Answer» The solubility product of silver bromide is $5.0 \times 10^{- 13}$ at 298k. Calculate its solubility at this temperature.

Discussion

6.	The oxides of chlorine, bromine and iodine are well known. They have various compositions. The oxides of chlorine are thermally unstable and dangerously explosive. They react with alkali. The bromine oxides are thermally more stable than chlorine oxides. The structure of halogen oxides is explained on the basis of VSEPR theory. The structure of Cl2O7 is O3Cl−O−ClO3 The Cl - O-Cl bond angle is:
Answer» The oxides of chlorine, bromine and iodine are well known. They have various compositions. The oxides of chlorine are thermally unstable and dangerously explosive. They react with alkali. The bromine oxides are thermally more stable than chlorine oxides. The structure of halogen oxides is explained on the basis of VSEPR theory. The structure of $C l_{2} O_{7}$ is $O_{3} C l - O - C l O_{3}$ The Cl - O-Cl bond angle is:

6.

The oxides of chlorine, bromine and iodine are well known. They have various compositions. The oxides of chlorine are thermally unstable and dangerously explosive. They react with alkali. The bromine oxides are thermally more stable than chlorine oxides. The structure of halogen oxides is explained on the basis of VSEPR theory. The structure of Cl2O7 is O3Cl−O−ClO3 The Cl - O-Cl bond angle is:

Answer»

The oxides of chlorine, bromine and iodine are well known. They have various compositions. The oxides of chlorine are thermally unstable and dangerously explosive. They react with alkali. The bromine oxides are thermally more stable than chlorine oxides. The structure of halogen oxides is explained on the basis of VSEPR theory.

The structure of $C l_{2} O_{7}$ is $O_{3} C l - O - C l O_{3}$ The Cl - O-Cl bond angle is:

Discussion

7.	The number of water molecules acting as ligands in CuSO4.5H2O, ZnSO4.5H2O, FeSO4.7H2O respectively are:
Answer» The number of water molecules acting as ligands in $C u S O_{4} .5 H_{2} O, Z n S O_{4} .5 H_{2} O, F e S O_{4} .7 H_{2} O$ respectively are:

Discussion

8.	One mole of a compound (C30H40O2) absorbs 6 moles of H2 in the presence of PtO2 at normal temperature and pressure. When the same compound is treated with H2 (g) under the presence of Lindlar's catalyst, the compound absorbs only one mole of H2 gas. How many double bonds are present in the compound?
Answer» One mole of a compound ( $C_{30} H_{40} O_{2}$ ) absorbs 6 moles of $H_{2}$ in the presence of $P t O_{2}$ at normal temperature and pressure. When the same compound is treated with $H_{2} (g)$ under the presence of Lindlar's catalyst, the compound absorbs only one mole of $H_{2}$ gas. How many double bonds are present in the compound?

Discussion

9.	The compound which reacts fastest with Lucas reagent at room temperature is :
Answer» The compound which reacts fastest with Lucas reagent at room temperature is :

Discussion

10.	A number consists of two digits, the sum of which is 5. If the unit's digit is multiplied by 92, it will be equal to three times the ten's digit. Find the number.
Answer» A number consists of two digits, the sum of which is 5. If the unit's digit is multiplied by $\frac{9}{2}$ , it will be equal to three times the ten's digit. Find the number.

Discussion

11.	Benzoic acid undergoes dimerisation in benzene solution. The van 't Hoff factor (i) is related to the degree of association ′x′ of the acid as:
Answer» Benzoic acid undergoes dimerisation in benzene solution. The van 't Hoff factor $(i)$ is related to the degree of association $^{'} x^{'}$ of the acid as:

Discussion

12.	B+CO2→A+B.A&B are as follows
Answer» $B + C O_{2}$ $\to A + B . A & B$ are as follows

Discussion

13.	5 gram of ethane are confined in a bulb of one liter capacity. The bulb is so weak that it will burst if the pressure reaches 10 atm. At what temperature the bulb burst ?
Answer» 5 gram of ethane are confined in a bulb of one liter capacity. The bulb is so weak that it will burst if the pressure reaches 10 atm. At what temperature the bulb burst ?

Discussion

14.	How many of the following compounds liberate CO2 with NaHCO3? ___
Answer» How many of the following compounds liberate $C O_{2}$ with $N a H C O_{3}$ ? ___

14.

How many of the following compounds liberate CO2 with NaHCO3? ___

Answer»

How many of the following compounds liberate $C O_{2}$ with $N a H C O_{3}$ ?

___

Discussion

15.	Upon reaction with CH3MgBr followed by protonation, the compound that produces ethanol is:
Answer» Upon reaction with $C H_{3} M g B r$ followed by protonation, the compound that produces ethanol is:

Discussion

16.	In a set of reactions, benzoic acid yielded a product D. C6H5COOHΔ−−−−−−−−→NaOH+CaOAacetyl chloride−−−−−−−−→anhy.AlCl3BHCN−−−→CHOH/H+−−−−−−→D The structure of D would be
Answer» In a set of reactions, benzoic acid yielded a product D. $C_{6} H_{5} C O O H Δ - ------- \to N a O H + C a O A acetyl chloride - ------- \to a n h y . A l C l_{3} B H C N - -- \to C H O H / H^{+} - ----- \to D$ The structure of D would be

Discussion

17.	180 mL of a hydrocarbon diffuses through a porous membrane in 15 minutes while 120 mL of SO2 under identical conditions diffuses in 20 minutes. What is the molecular mass of the hydrocarbon?
Answer» $180 mL$ of a hydrocarbon diffuses through a porous membrane in 15 minutes while $120 mL$ of $S O_{2}$ under identical conditions diffuses in 20 minutes. What is the molecular mass of the hydrocarbon?

Discussion

18.	How do enzymes catalyse a chemical reaction in the living system? Explain drug target interaction taking the example of enzyme as target.
Answer» How do enzymes catalyse a chemical reaction in the living system? Explain drug target interaction taking the example of enzyme as target.

Discussion

19.	Name two intermolecular forces that exist between HF molecules in liquid state.
Answer» Name two intermolecular forces that exist between HF molecules in liquid state.

Discussion

20.	In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and Reason both are correct statements an Reason is correct explanation for Assertion. (b) Assertion and Reason both are correct satements but Reason is not correct explanation for Assertion. (c) Assertion is correct statement but Reason is wrong statement (d) Assertion is wrong statement but Reason is correct statement. Assertion (A) Semiconductors are solids with conductivities in the intermediate range from 10−6−104ohm−1m−1. Reason (R) Intermediate conductivity in semiconductor is due to partially filled valence band.
Answer» In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and Reason both are correct statements an Reason is correct explanation for Assertion. (b) Assertion and Reason both are correct satements but Reason is not correct explanation for Assertion. (c) Assertion is correct statement but Reason is wrong statement (d) Assertion is wrong statement but Reason is correct statement. Assertion (A) Semiconductors are solids with conductivities in the intermediate range from $10^{-} 6 - 10^{4} o h m^{-} 1 m^{-} 1$ . Reason (R) Intermediate conductivity in semiconductor is due to partially filled valence band.

20.

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and Reason both are correct statements an Reason is correct explanation for Assertion. (b) Assertion and Reason both are correct satements but Reason is not correct explanation for Assertion. (c) Assertion is correct statement but Reason is wrong statement (d) Assertion is wrong statement but Reason is correct statement. Assertion (A) Semiconductors are solids with conductivities in the intermediate range from 10−6−104ohm−1m−1. Reason (R) Intermediate conductivity in semiconductor is due to partially filled valence band.

Answer»

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices.

(a) Assertion and Reason both are correct statements an Reason is correct explanation for Assertion.

(b) Assertion and Reason both are correct satements but Reason is not correct explanation for Assertion.

(c) Assertion is correct statement but Reason is wrong statement

(d) Assertion is wrong statement but Reason is correct statement.

Assertion (A) Semiconductors are solids with conductivities in the intermediate range from $10^{-} 6 - 10^{4} o h m^{-} 1 m^{-} 1$ .

Reason (R) Intermediate conductivity in semiconductor is due to partially filled valence band.

Discussion

21.	Which of the following statements are true about semiconductors ? (a) Silicon doped with electron rich impurity is a p-type semiconductor (b) Silicon doped with an electron rich impurity is an n-type semiconductor (c) Delocalised electrons increase the conductivity of doped silicon (d) An electron vacancy increases the conductivity of n-type semiconductor
Answer» Which of the following statements are true about semiconductors ? (a) Silicon doped with electron rich impurity is a p-type semiconductor (b) Silicon doped with an electron rich impurity is an n-type semiconductor (c) Delocalised electrons increase the conductivity of doped silicon (d) An electron vacancy increases the conductivity of n-type semiconductor

21.

Which of the following statements are true about semiconductors ? (a) Silicon doped with electron rich impurity is a p-type semiconductor (b) Silicon doped with an electron rich impurity is an n-type semiconductor (c) Delocalised electrons increase the conductivity of doped silicon (d) An electron vacancy increases the conductivity of n-type semiconductor

Answer»

Which of the following statements are true about semiconductors ?

(a) Silicon doped with electron rich impurity is a p-type semiconductor

(b) Silicon doped with an electron rich impurity is an n-type semiconductor

(c) Delocalised electrons increase the conductivity of doped silicon

(d) An electron vacancy increases the conductivity of n-type semiconductor

Discussion

22.	What should be the correct IUPAC name for diethylbromomethane? (a) 1-bromo-1, 1-diethylmethane (b) 3-bromopentane (c) 1-bromo-1, 1-ethylmethane (d) 1-bromopentane
Answer» What should be the correct IUPAC name for diethylbromomethane? (a) 1-bromo-1, 1-diethylmethane (b) 3-bromopentane (c) 1-bromo-1, 1-ethylmethane (d) 1-bromopentane

22.

What should be the correct IUPAC name for diethylbromomethane? (a) 1-bromo-1, 1-diethylmethane (b) 3-bromopentane (c) 1-bromo-1, 1-ethylmethane (d) 1-bromopentane

Answer»

What should be the correct IUPAC name for diethylbromomethane?

(a) 1-bromo-1, 1-diethylmethane (b) 3-bromopentane

(c) 1-bromo-1, 1-ethylmethane (d) 1-bromopentane

Discussion

23.	Explain why low molecular mass alcohols are soluble in water?
Answer» Explain why low molecular mass alcohols are soluble in water?

Discussion

24.	The students are given a vernier calipers to measure the outer diameter of a cylinder. The actual outer diameter is 4 cm. The measurements made are given in the following table: StudentMeasurements12345A44444B3.53.63.73.83.65C3.73.94.14.34D3.64.24.44.84.25E4.0053.9954.053.954 In case B, the measurements are said to be:
Answer» The students are given a vernier calipers to measure the outer diameter of a cylinder. The actual outer diameter is 4 cm. The measurements made are given in the following table: $\begin{matrix} S t u d e n t & M e a s u r e m e n t s 1 & 2 & 3 & 4 & 5 A & 4 & 4 & 4 & 4 & 4 B & 3.5 & 3.6 & 3.7 & 3.8 & 3.65 C & 3.7 & 3.9 & 4.1 & 4.3 & 4 D & 3.6 & 4.2 & 4.4 & 4.8 & 4.25 E & 4.005 & 3.995 & 4.05 & 3.95 & 4 \end{matrix}$ In case B, the measurements are said to be:

24.

The students are given a vernier calipers to measure the outer diameter of a cylinder. The actual outer diameter is 4 cm. The measurements made are given in the following table: StudentMeasurements12345A44444B3.53.63.73.83.65C3.73.94.14.34D3.64.24.44.84.25E4.0053.9954.053.954 In case B, the measurements are said to be:

Answer»

The students are given a vernier calipers to measure the outer diameter of a cylinder. The actual outer diameter is 4 cm. The measurements made are given in the following table:
$\begin{matrix} S t u d e n t & M e a s u r e m e n t s 1 & 2 & 3 & 4 & 5 A & 4 & 4 & 4 & 4 & 4 B & 3.5 & 3.6 & 3.7 & 3.8 & 3.65 C & 3.7 & 3.9 & 4.1 & 4.3 & 4 D & 3.6 & 4.2 & 4.4 & 4.8 & 4.25 E & 4.005 & 3.995 & 4.05 & 3.95 & 4 \end{matrix}$

In case B, the measurements are said to be:

Discussion

25.	The hybridization of any of the Carbon atoms in C2H2 is .
Answer» The hybridization of any of the Carbon atoms in C2H2 is .

Discussion

26.	Select the correct bond strength order for M-C:
Answer» Select the correct bond strength order for M-C:

Discussion

27.	Not able to understand integration an differentiation
Answer» Not able to understand integration an differentiation

Discussion

28.	QUES. In a closed packed arrangement ,A type of atoms are at corners , B type of atoms are at face corners , C type of atoms are at tetrahedral voids and D type of atoms are at octahedral voids. If all the atoms along any one body diagonal are removed. Then what will be the formula of compound?
Answer» QUES. In a closed packed arrangement ,A type of atoms are at corners , B type of atoms are at face corners , C type of atoms are at tetrahedral voids and D type of atoms are at octahedral voids. If all the atoms along any one body diagonal are removed. Then what will be the formula of compound?

Discussion

29.	Lithium borohydride crystallizes in an orthorhombic system with 4 molecules per unit cell. The unit cell dimensions are a = 6.8 Angstrom , b = 4.4 A and c = 7.2 angstrom . If the molar mass is 21. 76g , calculate density of Crystal
Answer» Lithium borohydride crystallizes in an orthorhombic system with 4 molecules per unit cell. The unit cell dimensions are a = 6.8 Angstrom , b = 4.4 A and c = 7.2 angstrom . If the molar mass is 21. 76g , calculate density of Crystal

Discussion

30.	Four molecules of gas have speeds 1, 2, 3 and 4 km s−1. The value of the root mean square speed of the gas molecule is
Answer» Four molecules of gas have speeds $1, 2, 3$ and $4 k m s^{- 1}$ . The value of the root mean square speed of the gas molecule is

Discussion

31.	What will be the normality of the solution obtained by mixing 100 mL of 0.2 M H2SO4 with 100 mL of 0.2 M NaOH ?
Answer» What will be the normality of the solution obtained by mixing $100 m L$ of $0.2 M H_{2} S O_{4}$ with $100 m L$ of $0.2 M N a O H$ ?

Discussion

32.	For a reaction kt+10/ kt =x when temperature is increased from 10 to 100 degree celcius k increased by a factor of 512 then value of x is ans 2
Answer» For a reaction k_t+10/ kt =x when temperature is increased from 10 to 100 degree celcius k increased by a factor of 512 then value of x is ans 2

32.

For a reaction kt+10/ kt =x when temperature is increased from 10 to 100 degree celcius k increased by a factor of 512 then value of x is ans 2

Answer»

For a reaction k_t+10/ kt =x when temperature is increased from 10 to 100 degree celcius k increased by a factor of 512 then value of x is

ans 2

Discussion

33.	Which of the following compound can react with hydroxylamine ?
Answer» Which of the following compound can react with hydroxylamine ?

Discussion

34.	Out of chlorobenzene and benzyl chloride, which one gets easily hydrolysed by aqueous NaOH and why?
Answer» Out of chlorobenzene and benzyl chloride, which one gets easily hydrolysed by aqueous NaOH and why?

Discussion

35.	Nitrogen can be purified from the impurities of oxides of nitrogen and ammonia by passing through?
Answer» Nitrogen can be purified from the impurities of oxides of nitrogen and ammonia by passing through?

Discussion

36.	Consider a sparingly soluble salt AB having solubility as s mol L−1. What will be the value of Ksp for AB salt.
Answer» Consider a sparingly soluble salt $A B$ having solubility as $s m o l L^{- 1}$ . What will be the value of $K_{s p}$ for $A B$ salt.

Discussion

37.	Which of the following statements is incorrect based on the graph? X, Y, Z can be different gases or the same gas at different temperatures.
Answer» Which of the following statements is incorrect based on the graph? X, Y, Z can be different gases or the same gas at different temperatures.

Discussion

38.	The efficiency of carnot engine is 50% and temperature of sink is 500 K. If temperature of source is kept constant and its efficiency raised to 60%, then required temperature of the sink will be:
Answer» The efficiency of carnot engine is $50 %$ and temperature of sink is $500 K$ . If temperature of source is kept constant and its efficiency raised to $60 %$ , then required temperature of the sink will be:

Discussion

39.	Which electronic transition in Li2+ ion would emit radiation of same wavelength as the wavelength of second Balmer line of H - atom?
Answer» Which electronic transition in $L i^{2 +}$ ion would emit radiation of same wavelength as the wavelength of second Balmer line of H - atom?

39.

Which electronic transition in Li2+ ion would emit radiation of same wavelength as the wavelength of second Balmer line of H - atom?

Answer»

Which electronic transition in $L i^{2 +}$ ion would emit radiation of same wavelength as the wavelength of second

Balmer line of H - atom?

Discussion

40.	The dependent of binding energy per nucleon (BN) on the mass number A is represented by
Answer» The dependent of binding energy per nucleon $(B_{N})$ on the mass number A is represented by

Discussion

41.	Emission of a positron
Answer» Emission of a positron

Discussion

42.	Ksp of CdS=8×10−27, Ksp of ZnS=1×10−21, Ka of H2S=1×10−21. What [H+] must be maintained in saturated H2S(0.1 M) to precipitate CdS but not ZnS, if [Cd2+]=[Zn2+]=0.1 M initially?
Answer» $K_{s p}$ of $C d S = 8 \times 10^{- 27}$ , $K_{s p}$ of $Z n S = 1 \times 10^{- 21}$ , $K_{a}$ of $H_{2} S = 1 \times 10^{- 21}$ . What $[H^{+}]$ must be maintained in saturated $H_{2} S (0.1 M)$ to precipitate $C d S$ but not $Z n S$ , if $[C d^{2 +}] = [Z n^{2 +}] = 0.1 M$ initially?

Discussion

43.	The work function of substance is 4 eV, then which of the following cannot cause photoelectric emission from the substance ? (hc=1242 eV−nm)
Answer» The work function of substance is $4 e V$ , then which of the following cannot cause photoelectric emission from the substance ? $(h c = 1242 e V - n m)$

Discussion

44.	Inversion of sucrose (C12H22O11) is a first order reaction and is studied by measuring angle of rotation at different intervals of time C12H22O11d-Sucrose+H2O H+−−→C6H12O6d -Glucose+C6H12O6l -Fructose r0 = angle of rotation at the start, rt = angle of rotation at time ti, and r∞ = angle of rotation at the complete reaction, if 50% of sucrose undergoes inversion, then
Answer» Inversion of sucrose $(C_{12} H_{22} O_{11})$ is a first order reaction and is studied by measuring angle of rotation at different intervals of time $C_{12} H_{22} O_{11} d-Sucrose + H_{2} O H^{+} - - \to C_{6} H_{12} O_{6} d -Glucose + C_{6} H_{12} O_{6} l -Fructose$ $r_{0}$ = angle of rotation at the start, $r_{t}$ = angle of rotation at time ti, and $r_{\infty}$ = angle of rotation at the complete reaction, if 50% of sucrose undergoes inversion, then

Discussion

45.	The solubility of Mg(OH)2 in water at 25∘C is 0.00912 g per litre. Find Ksp for Mg(OH)2 assuming complete ionization.
Answer» The solubility of $M g (O H)_{2}$ in water at $25^{\circ} C$ is $0.00912 g$ per litre. Find $K_{s p}$ for $M g (O H)_{2}$ assuming complete ionization.

Discussion

46.	Which species has the maximum ionic radius
Answer» Which species has the maximum ionic radius

Discussion

47.	Tautomerism will be exhibited by:
Answer» Tautomerism will be exhibited by:

Discussion

48.	The number of moles of KMnO4 that will be needed to react with one mole of sulphite ion in acidic solution is:
Answer» The number of moles of $K M n O_{4}$ that will be needed to react with one mole of sulphite ion in acidic solution is:

Discussion

49.	For a given reaction lnk=−(100×103)T+4 then ΔS0 for the reaction is (in calmol−1)
Answer» For a given reaction $l n k = \frac{- (100 \times 10^{3})}{T} + 4$ then $Δ S^{0}$ for the reaction is (in $c a l m o l^{- 1}$ )

Discussion

50.	What are natural and synthetic polymers? Give two examples of each type.
Answer» What are natural and synthetic polymers? Give two examples of each type.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Calculate [OH−] of a 0.01 M solution of ammonium hydroxide. The ionization constant for NH4OH (kb)=1.6×10−5 (Take log2=0.30)

Number of equivalent(s) of HI required for a complete reaction with the above compound is/are

List-I contains questions related to the reaction sequence given and List-II contains their answers. Which of the following options has the correct combination considering List-I and List-II?

The solubility product of silver bromide is 5.0×10−13 at 298k. Calculate its solubility at this temperature.

The number of water molecules acting as ligands in CuSO4.5H2O, ZnSO4.5H2O, FeSO4.7H2O respectively are:

The compound which reacts fastest with Lucas reagent at room temperature is :

A number consists of two digits, the sum of which is 5. If the unit's digit is multiplied by 92, it will be equal to three times the ten's digit. Find the number.

Benzoic acid undergoes dimerisation in benzene solution. The van 't Hoff factor (i) is related to the degree of association ′x′ of the acid as:

B+CO2→A+B.A&amp;B are as follows

5 gram of ethane are confined in a bulb of one liter capacity. The bulb is so weak that it will burst if the pressure reaches 10 atm. At what temperature the bulb burst ?

How many of the following compounds liberate CO2 with NaHCO3? ___

Upon reaction with CH3MgBr followed by protonation, the compound that produces ethanol is:

In a set of reactions, benzoic acid yielded a product D. C6H5COOHΔ−−−−−−−−→NaOH+CaOAacetyl chloride−−−−−−−−→anhy.AlCl3BHCN−−−→CHOH/H+−−−−−−→D The structure of D would be

180 mL of a hydrocarbon diffuses through a porous membrane in 15 minutes while 120 mL of SO2 under identical conditions diffuses in 20 minutes. What is the molecular mass of the hydrocarbon?

How do enzymes catalyse a chemical reaction in the living system? Explain drug target interaction taking the example of enzyme as target.

Name two intermolecular forces that exist between HF molecules in liquid state.

What should be the correct IUPAC name for diethylbromomethane? (a) 1-bromo-1, 1-diethylmethane (b) 3-bromopentane (c) 1-bromo-1, 1-ethylmethane (d) 1-bromopentane

Explain why low molecular mass alcohols are soluble in water?

The hybridization of any of the Carbon atoms in C2H2 is .

Select the correct bond strength order for M-C:

Not able to understand integration an differentiation

QUES. In a closed packed arrangement ,A type of atoms are at corners , B type of atoms are at face corners , C type of atoms are at tetrahedral voids and D type of atoms are at octahedral voids. If all the atoms along any one body diagonal are removed. Then what will be the formula of compound?

Lithium borohydride crystallizes in an orthorhombic system with 4 molecules per unit cell. The unit cell dimensions are a = 6.8 Angstrom , b = 4.4 A and c = 7.2 angstrom . If the molar mass is 21. 76g , calculate density of Crystal

Four molecules of gas have speeds 1, 2, 3 and 4 km s−1. The value of the root mean square speed of the gas molecule is

What will be the normality of the solution obtained by mixing 100 mL of 0.2 M H2SO4​ with 100 mL of 0.2 M NaOH ?

For a reaction k​​​​​​t+10/ kt =x when temperature is increased from 10 to 100 degree celcius k increased by a factor of 512 then value of x is ans 2

Which of the following compound can react with hydroxylamine ?

Out of chlorobenzene and benzyl chloride, which one gets easily hydrolysed by aqueous NaOH and why?

Nitrogen can be purified from the impurities of oxides of nitrogen and ammonia by passing through?

Consider a sparingly soluble salt AB having solubility as s mol L−1. What will be the value of Ksp for AB salt.

Which of the following statements is incorrect based on the graph? X, Y, Z can be different gases or the same gas at different temperatures.

The efficiency of carnot engine is 50% and temperature of sink is 500 K. If temperature of source is kept constant and its efficiency raised to 60%, then required temperature of the sink will be:

Which electronic transition in Li2+ ion would emit radiation of same wavelength as the wavelength of second Balmer line of H - atom?

The dependent of binding energy per nucleon (BN) on the mass number A is represented by

Emission of a positron

Ksp of CdS=8×10−27, Ksp of ZnS=1×10−21, Ka of H2S=1×10−21. What [H+] must be maintained in saturated H2S(0.1 M) to precipitate CdS but not ZnS, if [Cd2+]=[Zn2+]=0.1 M initially?

The work function of substance is 4 eV, then which of the following cannot cause photoelectric emission from the substance ? (hc=1242 eV−nm)

The solubility of Mg(OH)2 in water at 25∘C is 0.00912 g per litre. Find Ksp for Mg(OH)2 assuming complete ionization.

Which species has the maximum ionic radius

Tautomerism will be exhibited by:

The number of moles of KMnO4 that will be needed to react with one mole of sulphite ion in acidic solution is:

For a given reaction lnk=−(100×103)T+4 then ΔS0 for the reaction is (in calmol−1)

What are natural and synthetic polymers? Give two examples of each type.

B+CO2→A+B.A&B are as follows

What will be the normality of the solution obtained by mixing 100 mL of 0.2 M H2SO4 with 100 mL of 0.2 M NaOH ?

For a reaction kt+10/ kt =x when temperature is increased from 10 to 100 degree celcius k increased by a factor of 512 then value of x is ans 2