46295 + Interview Questions in Chemistry

1.	The number of isomers of the compound C2FClBrI is:a.3b.4c.5d.6
Answer» The number of isomers of the compound C₂FClBrI is: a.3 b.4 c.5 d.6

1.

The number of isomers of the compound C2FClBrI is:a.3b.4c.5d.6

Answer»

The number of isomers of the compound C₂FClBrI is:

a.3

b.4

c.5

d.6

Discussion

2.	The reciprocal of compressibility factor of a real gas in the critical state is ?
Answer» The reciprocal of compressibility factor of a real gas in the critical state is ?

Discussion

3.	For a chemical reaction A+B⇌C+D (ΔrHo=80 kJ mol1) the entropy change ΔrSo depends on the temperature T (in K) as ΔrSo=2T (JK−1 mol−1). Minimum temperature at which it will become spontaneous is ________ K .
Answer» For a chemical reaction $A + B ⇌ C + D (Δ_{r} H^{o} = 80 k J m o l^{1})$ the entropy change $Δ_{r} S^{o}$ depends on the temperature $T$ (in $K$ ) as $Δ_{r} S^{o} = 2 T (J K^{- 1} m o l^{- 1})$ . Minimum temperature at which it will become spontaneous is ________ $K$ .

Discussion

4.	Show the reaction of ester with grignard reagent to give tertiary alcohol, with the number of moles of each required.
Answer» Show the reaction of ester with grignard reagent to give tertiary alcohol, with the number of moles of each required.

Discussion

5.	Giveone chemical test to distinguish between the following pairs ofcompounds.(i) Methylamineand dimethylamine (ii) Secondary and tertiary amines(iii) Ethylamine and aniline(iv) Aniline and benzylamine(v) Anilineand N-methylaniline.
Answer» Give one chemical test to distinguish between the following pairs of compounds. (i) Methylamine and dimethylamine (ii) Secondary and tertiary amines (iii) Ethylamine and aniline (iv) Aniline and benzylamine (v) Aniline and N-methylaniline.

5.

Giveone chemical test to distinguish between the following pairs ofcompounds.(i) Methylamineand dimethylamine (ii) Secondary and tertiary amines(iii) Ethylamine and aniline(iv) Aniline and benzylamine(v) Anilineand N-methylaniline.

Answer»

Give
one chemical test to distinguish between the following pairs of
compounds.

(i) Methylamine
and dimethylamine

(ii)
Secondary and tertiary amines

(iii)
Ethylamine and aniline

(iv)
Aniline and benzylamine

(v) Aniline
and N-methylaniline.

Discussion

6.	Which one of the following compounds show both Schottky and Frenkel defects?
Answer» Which one of the following compounds show both Schottky and Frenkel defects?

Discussion

7.	Out of the following reagents, electrophiles are (i) R_3N (ii) :CCl_2 (iii) CH_3^+ (iv) H_2O (v)H_3O^+ (vi) Na^+ (1) (i), (ii) , (iii) (iv), (v) (2) (ii), (iii), (v) (3) (ii),(iii),(iv) (4) (ii),(iii), (iv),(v),(vi)
Answer» Out of the following reagents, electrophiles are (i) R_3N (ii) :CCl_2 (iii) CH_3^+ (iv) H_2O (v)H_3O^+ (vi) Na^+ (1) (i), (ii) , (iii) (iv), (v) (2) (ii), (iii), (v) (3) (ii),(iii),(iv) (4) (ii),(iii), (iv),(v),(vi)

Discussion

8.	The coordination number of cation and anion in Fluorite CaF2 and CsCl are respectively
Answer» The coordination number of cation and anion in Fluorite $C a F_{2}$ and CsCl are respectively

Discussion

9.	A definite amount of solid NH_4HS is placed in a flask already containing ammonia gas at a certain temperature and 0.50 atm pressure. NH_4HS decomposes to give NH_3 and H_2S and at equilibrium total pressure in a flask is 0.84 atm. The equilibrium cons†an t for the reaction is :
Answer» A definite amount of solid NH_4HS is placed in a flask already containing ammonia gas at a certain temperature and 0.50 atm pressure. NH_4HS decomposes to give NH_3 and H_2S and at equilibrium total pressure in a flask is 0.84 atm. The equilibrium cons†an t for the reaction is :

Discussion

10.	A sample of ammonium phosphate (NH)POcontains 3.18 moles of hydrogen atoms. Thenumber of moles of oxygen atoms in the sample is
Answer» A sample of ammonium phosphate (NH)POcontains 3.18 moles of hydrogen atoms. Thenumber of moles of oxygen atoms in the sample is

Discussion

11.	What is the first second and third coordination number for BCC and CCP lattice?
Answer» What is the first second and third coordination number for BCC and CCP lattice?

Discussion

12.	Hi sir I recently tied Holy thread from the temple I have one doubt in that..... that is if I put my hand in water that thread stretches my hand when my hand is in dry condition the thread losses and appears like long why this is happen please tell me.....
Answer» Hi sir I recently tied Holy thread from the temple I have one doubt in that..... that is if I put my hand in water that thread stretches my hand when my hand is in dry condition the thread losses and appears like long why this is happen please tell me.....

Discussion

13.	What is HCF and Mean difference
Answer» What is HCF and Mean difference

Discussion

14.	Which of the following haloforms would result if iodine were used as the halogen in the haloform reaction?
Answer» Which of the following haloforms would result if iodine were used as the halogen in the haloform reaction?

Discussion

15.	For a spontaneous reaction △G, equilibrium constant (K) and E∘cell will be respectively:
Answer» For a spontaneous reaction $△$ G, equilibrium constant (K) and $E_{c e l l}^{\circ}$ will be respectively:

Discussion

16.	P4+3NaOH+3H2O⟶3Na(H2PO2)+PH3 is an example of:
Answer» $P_{4} + 3 N a O H + 3 H_{2} O ⟶ 3 N a (H_{2} P O_{2}) + P H_{3}$ is an example of:

Discussion

17.	Which will react most easily with protons Aniline, P-nitroaniline, P-methoxyaniline, 1-phenylmethanamine
Answer» Which will react most easily with protons Aniline, P-nitroaniline, P-methoxyaniline, 1-phenylmethanamine

Discussion

18.	The equilibrium constant, Kp for the reaction, 2NOCl(g) 2NO(g) + Cl2(g)is 6.95*10^-8 at 298K. The standard Gibb's free energy change, ΔG° at 298K will be (R=2calK^-1mole^-1) (log6.95=0.8420)(a) 4.912 kcal (b) 14.74 kcal(c) 7.3 kcal(d) 9.825 kcal
Answer» The equilibrium constant, Kp for the reaction, 2NOCl(g) 2NO(g) + Cl2(g) is 6.95*10^-8 at 298K. The standard Gibb's free energy change, ΔG° at 298K will be (R=2calK^-1mole^-1) (log6.95=0.8420) (a) 4.912 kcal (b) 14.74 kcal (c) 7.3 kcal (d) 9.825 kcal

Discussion

19.	What is sum of all the isomeric aromatic compounds of the formula B3N3HnCl(6−n) (isomeric chloro substituted inorganic benzene), where n belongs to [0,6] ?
Answer» What is sum of all the isomeric aromatic compounds of the formula $B_{3} N_{3} H_{n} C l_{(6 - n)}$ (isomeric chloro substituted inorganic benzene), where n belongs to [0,6] ?

Discussion

20.	Air contains 23 % oxygen and 77 nitrogen by weight . The percentage of O_2 by volume is
Answer» Air contains 23 % oxygen and 77 nitrogen by weight . The percentage of O_2 by volume is

Discussion

21.	What is the heat of formation of liquid methyl alcohol in kJ mol−1 , use the following data. Heat of vaporization of liquid methyl alcohol = 38 kJ mol−1 . Heat of formation of gaseous atoms from the elements in their standard states: H=218 kJ mol−1,C=715 kJ mol−1, O=249 kJ mol−1 Average bond energies : C−H=415 kJ mol−1 C−O=356 kJ mol−1 O−H=463 kJ mol−1
Answer» What is the heat of formation of liquid methyl alcohol in $k J m o l^{- 1},$ use the following data. Heat of vaporization of liquid methyl alcohol = $38 k J m o l^{- 1}$ . Heat of formation of gaseous atoms from the elements in their standard states: $H = 218 k J m o l^{- 1}, C = 715 k J m o l^{- 1}, O = 249 k J m o l^{- 1}$ Average bond energies : $C - H = 415 k J m o l^{- 1} C - O = 356 k J m o l^{- 1} O - H = 463 k J m o l^{- 1}$

Discussion

22.	Vapour pressure of a water is 360 mm Hg. How much urea should be added to 200 ml water to reduce its vapour pressure by 0.5%
Answer» Vapour pressure of a water is 360 mm Hg. How much urea should be added to 200 ml water to reduce its vapour pressure by 0.5%

Discussion

23.	In compounds of type ECl3, wher E=B, P, As or Bi, the angles Cl−E−Cl for different E are in the order:
Answer» In compounds of type $E C l_{3}$ , wher $E = B, P, A s o r B i,$ the angles $C l - E - C l$ for different $E$ are in the order:

Discussion

24.	1. Cube 2. Greece 3. Iraq 4. Costa Rica 5. Japan Which one of the following sequential orders gives the correct arrangement of the countries according to their standard time from ahead to behind GMT?
Answer» 1. Cube 2. Greece 3. Iraq 4. Costa Rica 5. Japan Which one of the following sequential orders gives the correct arrangement of the countries according to their standard time from ahead to behind GMT?

24.

1. Cube 2. Greece 3. Iraq 4. Costa Rica 5. Japan Which one of the following sequential orders gives the correct arrangement of the countries according to their standard time from ahead to behind GMT?

Answer»

1. Cube

2. Greece

3. Iraq

4. Costa Rica

5. Japan

Which one of the following sequential orders gives the correct arrangement of the countries according to their standard time from ahead to behind GMT?

Discussion

25.	Mettez les phrases au passé composé.1. Il apprend la langue française.2. Nous attendons quelques minutes devant l'église.3. J'ouvre la porte et je vois un bel homme.4. La bonne met le couvert et elle appelle les invités.5. Nous pouvons finir notre travail à l'heure.6. Je visite mon gendre à Nice.7. Nous éteignons la lumière et nous fermons la porte.8. Je vois une belle femme mais soudain elle disparaît.9. Je ris aux larmes après je vois cette émission sur la télé.10. Nous accompagnons nos cousins à la campagne.11. Le lapin court très vite mais encore il prend la course.12. Les enfants boivent de l'eau minérale.
Answer» Mettez les phrases au passé composé. 1. Il apprend la langue française. 2. Nous attendons quelques minutes devant l'église. 3. J'ouvre la porte et je vois un bel homme. 4. La bonne met le couvert et elle appelle les invités. 5. Nous pouvons finir notre travail à l'heure. 6. Je visite mon gendre à Nice. 7. Nous éteignons la lumière et nous fermons la porte. 8. Je vois une belle femme mais soudain elle disparaît. 9. Je ris aux larmes après je vois cette émission sur la télé. 10. Nous accompagnons nos cousins à la campagne. 11. Le lapin court très vite mais encore il prend la course. 12. Les enfants boivent de l'eau minérale.

Discussion

26.	how log2=0?
Answer» how log2=0?

Discussion

27.	6. Calculate the mole fraction of ethylene glycol in a solution containing 20percent of glycol by mass
Answer» 6. Calculate the mole fraction of ethylene glycol in a solution containing 20percent of glycol by mass

Discussion

28.	Question 03 The types of hybrid orbitals of nitrogen in NO+2,NO−3 and NH+4 respectively are expected to be (a) sp,sp3 and sp2 (b) sp,sp2 and sp3 (c) sp2,sp and sp3 (d) sp2,sp3 and sp
Answer» Question 03 The types of hybrid orbitals of nitrogen in $N O_{2}^{+}, N O_{3}^{-} a n d N H_{4}^{+}$ respectively are expected to be (a) $s p, s p^{3} a n d s p^{2}$ (b) $s p, s p^{2} a n d s p^{3}$ (c) $s p^{2}, s p a n d s p^{3}$ (d) $s p^{2}, s p^{3} a n d s p$

28.

Question 03 The types of hybrid orbitals of nitrogen in NO+2,NO−3 and NH+4 respectively are expected to be (a) sp,sp3 and sp2 (b) sp,sp2 and sp3 (c) sp2,sp and sp3 (d) sp2,sp3 and sp

Answer»

Question 03

The types of hybrid orbitals of nitrogen in $N O_{2}^{+}, N O_{3}^{-} a n d N H_{4}^{+}$ respectively are expected to be

(a) $s p, s p^{3} a n d s p^{2}$

(b) $s p, s p^{2} a n d s p^{3}$

(c) $s p^{2}, s p a n d s p^{3}$

(d) $s p^{2}, s p^{3} a n d s p$

Discussion

29.	what happens when these nitrates reacts with KCN -Cu(NO3)2 AgNO3 Cd(NO3)2 Pb(NO3)2
Answer» what happens when these nitrates reacts with KCN -Cu(NO3)2 AgNO3 Cd(NO3)2 Pb(NO3)2

Discussion

30.	85.Among the following which one is most reactive towards alcoholic KOHand with explanation a. CH2=CHBr b.CH3COCH2CH2Br c.CH3CH2Br d.CH3CH2CH2Br
Answer» 85.Among the following which one is most reactive towards alcoholic KOHand with explanation a. CH2=CHBr b.CH3COCH2CH2Br c.CH3CH2Br d.CH3CH2CH2Br

Discussion

31.	42. The circumference of the 4th Bohr orbit hydrogen atom is 5.32nm. The de Broglie wavelength for the electron is?
Answer» 42. The circumference of the 4th Bohr orbit hydrogen atom is 5.32nm. The de Broglie wavelength for the electron is?

Discussion

32.	Alkali metals(M) dissolve in liquid NH3 to give
Answer» Alkali metals(M) dissolve in liquid $N H_{3}$ to give

Discussion

33.	integrate 1/(2x+3)
Answer» integrate 1/(2x+3)

Discussion

34.	The reagent than can be used to distinguish between pent-1-yne and pent-2-yne is :
Answer» The reagent than can be used to distinguish between pent-1-yne and pent-2-yne is :

Discussion

35.	Glucose, when reduced with HI and red phosphorus gives:
Answer» Glucose, when reduced with HI and red phosphorus gives:

Discussion

36.	29. The freezing point of a 0.08m sol of NaHS04 is-0.372.Calculate the dissociation constant for the reaction: HSO4=H+SO4 Kf for water=1.86K kg/mole
Answer» 29. The freezing point of a 0.08m sol of NaHS04 is-0.372.Calculate the dissociation constant for the reaction: HSO4=H+SO4 Kf for water=1.86K kg/mole

Discussion

37.	A helium nucleus makes a full rotation in a circle of radius 0.8 meter in two seconds. The value of B at the centre of the circle will be
Answer» A helium nucleus makes a full rotation in a circle of radius 0.8 meter in two seconds. The value of B at the centre of the circle will be

Discussion

38.	A ball weighing 10 g is moving with a velocity of 90 m s−1. If the uncertainty in its velocity is 5%, then the uncertainty in its position is______×10−33 m. (Rounded off to the nearest integer)[Given: h=6.63×10−34 J s]
Answer» A ball weighing $10 g$ is moving with a velocity of $90 m s^{- 1}$ . If the uncertainty in its velocity is 5%, then the uncertainty in its position is______ $\times 10^{- 33} m$ . (Rounded off to the nearest integer) [Given: $h = 6.63 \times 10^{- 34} J s$ ]

Discussion

39.	calculate the carbonate conc. in [CO3 ] in a 0.10 M solution of the weak acid,carbonic acid (H2CO3 ). The dissociationconstants of carbonic acid are Ka1 =4.510^-7 & Ka210^-11and .(1) 4.7 × 10^-4 M(2) 1.0 × 10^-4 M(3) 4.5 × 10^-4 M(4) 2.1 × 10^-4 M
Answer» calculate the carbonate conc. in [CO3 ] in a 0.10 M solution of the weak acid, carbonic acid (H2CO3 ). The dissociation constants of carbonic acid are Ka1 =4.510^-7 & Ka210^-11 and . (1) 4.7 × 10^-4 M (2) 1.0 × 10^-4 M (3) 4.5 × 10^-4 M (4) 2.1 × 10^-4 M

Discussion

40.	Butyne-1 and Butene-1 can be distinguished by
Answer» Butyne-1 and Butene-1 can be distinguished by

Discussion

41.	ntASSAERTION - IN BENZYNE THE HYBRIDISATION OF TRIPLY BONDED CARBON IS sp2n ntREASON-THE SECOND PIE BOND IS FORMED BY sp2 HYBRIDISED ORBITALn ntALSO TELL ME WHAT IS BENZYNE AND SECOND PIE BONDn
Answer» ntASSAERTION - IN BENZYNE THE HYBRIDISATION OF TRIPLY BONDED CARBON IS sp2n ntREASON-THE SECOND PIE BOND IS FORMED BY sp2 HYBRIDISED ORBITALn ntALSO TELL ME WHAT IS BENZYNE AND SECOND PIE BONDn

Discussion

42.	Analyze the reaction given above and identify 'X' from the following options. CH3CH2OH(aq)+Xacid−−→CH3CH2COOCH2CH3(aq)+H2O(aq)
Answer» Analyze the reaction given above and identify 'X' from the following options. ${CH}_{3} {CH}_{2} OH(aq) + X acid - - \to {CH}_{3} {CH}_{2} {COOCH}_{2} {CH}_{3} (aq) + H_{2} O (aq)$

Discussion

43.	The product obtained from the electrolytic oxidation of acidified sulphate solution , is
Answer» The product obtained from the electrolytic oxidation of acidified sulphate solution , is

Discussion

44.	What is the density of hydrogen gas at S.T.P.
Answer» What is the density of hydrogen gas at S.T.P.

Discussion

45.	Silicon is
Answer» Silicon is

Discussion

46.	Initially, the entire earth was in a state.
Answer» Initially, the entire earth was in a state.

Discussion

47.	A gas mixture consist of 3 moles of oxygen and 5 moles of argon at temperature T. Considering only translational and rotational modes, the total internal energy of the system is:
Answer» A gas mixture consist of $3 moles$ of oxygen and $5 moles$ of argon at temperature $T$ . Considering only translational and rotational modes, the total internal energy of the system is:

Discussion

48.	20. cb_bcb_ _ c_ab_bab(1) aabbb(2) ababc(3) abaac(4) aabbc
Answer» 20. cb_bcb_ _ c_ab_bab (1) aabbb (2) ababc (3) abaac (4) aabbc

Discussion

49.	The NACL structure can be converted into CsCL structure by?
Answer» The NACL structure can be converted into CsCL structure by?

Discussion

50.	Gold crystallizes in ccp structure.The total no. of void present in 197g of Gold will be
Answer» Gold crystallizes in ccp structure.The total no. of void present in 197g of Gold will be

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The number of isomers of the compound C2FClBrI is:a.3b.4c.5d.6

The reciprocal of compressibility factor of a real gas in the critical state is ?

For a chemical reaction A+B⇌C+D (ΔrHo=80 kJ mol1) the entropy change ΔrSo depends on the temperature T (in K) as ΔrSo=2T (JK−1 mol−1). Minimum temperature at which it will become spontaneous is ________ K .

Show the reaction of ester with grignard reagent to give tertiary alcohol, with the number of moles of each required.

Giveone chemical test to distinguish between the following pairs ofcompounds.(i) Methylamineand dimethylamine (ii) Secondary and tertiary amines(iii) Ethylamine and aniline(iv) Aniline and benzylamine(v) Anilineand N-methylaniline.

Which one of the following compounds show both Schottky and Frenkel defects?

Out of the following reagents, electrophiles are (i) R_3N (ii) :CCl_2 (iii) CH_3^+ (iv) H_2O (v)H_3O^+ (vi) Na^+ (1) (i), (ii) , (iii) (iv), (v) (2) (ii), (iii), (v) (3) (ii),(iii),(iv) (4) (ii),(iii), (iv),(v),(vi)

The coordination number of cation and anion in Fluorite CaF2 and CsCl are respectively

A definite amount of solid NH_4HS is placed in a flask already containing ammonia gas at a certain temperature and 0.50 atm pressure. NH_4HS decomposes to give NH_3 and H_2S and at equilibrium total pressure in a flask is 0.84 atm. The equilibrium cons†an t for the reaction is :

A sample of ammonium phosphate (NH)POcontains 3.18 moles of hydrogen atoms. Thenumber of moles of oxygen atoms in the sample is

What is the first second and third coordination number for BCC and CCP lattice?

Hi sir I recently tied Holy thread from the temple I have one doubt in that..... that is if I put my hand in water that thread stretches my hand when my hand is in dry condition the thread losses and appears like long why this is happen please tell me.....

What is HCF and Mean difference

Which of the following haloforms would result if iodine were used as the halogen in the haloform reaction?

For a spontaneous reaction △G, equilibrium constant (K) and E∘cell will be respectively:

P4+3NaOH+3H2O⟶3Na(H2PO2)+PH3 is an example of:

Which will react most easily with protons Aniline, P-nitroaniline, P-methoxyaniline, 1-phenylmethanamine

The equilibrium constant, Kp for the reaction, 2NOCl(g) 2NO(g) + Cl2(g)is 6.95*10^-8 at 298K. The standard Gibb's free energy change, ΔG° at 298K will be (R=2calK^-1mole^-1) (log6.95=0.8420)(a) 4.912 kcal (b) 14.74 kcal(c) 7.3 kcal(d) 9.825 kcal

What is sum of all the isomeric aromatic compounds of the formula B3N3HnCl(6−n) (isomeric chloro substituted inorganic benzene), where n belongs to [0,6] ?

Air contains 23 % oxygen and 77 nitrogen by weight . The percentage of O_2 by volume is

Vapour pressure of a water is 360 mm Hg. How much urea should be added to 200 ml water to reduce its vapour pressure by 0.5%

In compounds of type ECl3, wher E=B, P, As or Bi, the angles Cl−E−Cl for different E are in the order:

1. Cube 2. Greece 3. Iraq 4. Costa Rica 5. Japan Which one of the following sequential orders gives the correct arrangement of the countries according to their standard time from ahead to behind GMT?

how log2=0?

6. Calculate the mole fraction of ethylene glycol in a solution containing 20percent of glycol by mass

Question 03 The types of hybrid orbitals of nitrogen in NO+2,NO−3 and NH+4 respectively are expected to be (a) sp,sp3 and sp2 (b) sp,sp2 and sp3 (c) sp2,sp and sp3 (d) sp2,sp3 and sp

what happens when these nitrates reacts with KCN -Cu(NO3)2 AgNO3 Cd(NO3)2 Pb(NO3)2

85.Among the following which one is most reactive towards alcoholic KOHand with explanation a. CH2=CHBr b.CH3COCH2CH2Br c.CH3CH2Br d.CH3CH2CH2Br

42. The circumference of the 4th Bohr orbit hydrogen atom is 5.32nm. The de Broglie wavelength for the electron is?

Alkali metals(M) dissolve in liquid NH3 to give

integrate 1/(2x+3)

The reagent than can be used to distinguish between pent-1-yne and pent-2-yne is :

Glucose, when reduced with HI and red phosphorus gives:

29. The freezing point of a 0.08m sol of NaHS04 is-0.372.Calculate the dissociation constant for the reaction: HSO4=H+SO4 Kf for water=1.86K kg/mole

A helium nucleus makes a full rotation in a circle of radius 0.8 meter in two seconds. The value of B at the centre of the circle will be

A ball weighing 10 g is moving with a velocity of 90 m s−1. If the uncertainty in its velocity is 5%, then the uncertainty in its position is______×10−33 m. (Rounded off to the nearest integer)[Given: h=6.63×10−34 J s]

calculate the carbonate conc. in [CO3 ] in a 0.10 M solution of the weak acid,carbonic acid (H2CO3 ). The dissociationconstants of carbonic acid are Ka1 =4.5*10^-7 & Ka2*10^-11and .(1) 4.7 × 10^-4 M(2) 1.0 × 10^-4 M(3) 4.5 × 10^-4 M(4) 2.1 × 10^-4 M

Butyne-1 and Butene-1 can be distinguished by

ntASSAERTION - IN BENZYNE THE HYBRIDISATION OF TRIPLY BONDED CARBON IS sp2n ntREASON-THE SECOND PIE BOND IS FORMED BY sp2 HYBRIDISED ORBITALn ntALSO TELL ME WHAT IS BENZYNE AND SECOND PIE BONDn

Analyze the reaction given above and identify 'X' from the following options. CH3CH2OH(aq)+Xacid−−→CH3CH2COOCH2CH3(aq)+H2O(aq)

The product obtained from the electrolytic oxidation of acidified sulphate solution , is

What is the density of hydrogen gas at S.T.P.

Silicon is

Initially, the entire earth was in a state.

A gas mixture consist of 3 moles of oxygen and 5 moles of argon at temperature T. Considering only translational and rotational modes, the total internal energy of the system is:

20. cb_bcb_ _ c_ab_bab(1) aabbb(2) ababc(3) abaac(4) aabbc

The NACL structure can be converted into CsCL structure by?

Gold crystallizes in ccp structure.The total no. of void present in 197g of Gold will be

calculate the carbonate conc. in [CO3 ] in a 0.10 M solution of the weak acid,carbonic acid (H2CO3 ). The dissociationconstants of carbonic acid are Ka1 =4.510^-7 & Ka210^-11and .(1) 4.7 × 10^-4 M(2) 1.0 × 10^-4 M(3) 4.5 × 10^-4 M(4) 2.1 × 10^-4 M