94420 + Interview Questions in Chemistry in Class 12

1.	Intermolecular forces between two benzene molecules are nearly of same strength as those between two toluene molecules. For a mixture of benzene and toluene, which of the following are not true?
Answer» `Delta_(mix)H-zero` `Delta_(mix)V=zero` These will FORM minimum BOILING azeotrope. These will not form ideal solution. Solution :are not ture statemnents

Discussion

2.	Intermolecular attractions among the moleules of any gas are minimum at
Answer» `-10^(@)C and 5` ATM `-10^(@)C and 3` atm `5^(@)C and 2` atm `100^(@)C and 1` atm Answer :D

Discussion

3.	Intermolecular dehydration of alcohols gives :
Answer» Alkenes Ketones Alkynes Ethers Answer :D

Discussion

4.	Intermolecular dehydration of alcohol gives
Answer» Alkenes Ethers Alkynes Aldehydes Answer :B

Discussion

5.	Intermediates formed during the reaction of RCONH_2 with Br_2and KOH are :
Answer» RNHCOBr and RNCO RNHBr and RCONHBR `RCONBr_2` RCONHBr and RNCO Answer :D

Discussion

6.	Intermediate product of hydrolysis of cyanide is
Answer» `RCOONH_4` `RCONH_2` `R-UNDERSET(OH)underset(\|)C=NH` `R-C-=overset(o+)NH` ANSWER :B

Discussion

7.	Intermediate.
Answer» Solution :The species formed during the COURSE of a reaction, which has definite life- TIME and can be isolated. It has energy LOWER than that of the preceing transition STATE, but higher than the REACTANTS or products is called an intermediate.

Discussion

8.	Intermediate product formed in the acid catalysed dehydration of n-propyl alcohol is:
Answer» `CH_3 - CH_2 - CH_3` `CH_3 - CH - CH_2^+` `CH_3 - CH^+ - CH_3` `CH_3 - CH_2 - CH_2` ANSWER :C

Discussion

9.	Intermediate compound formation theory is unable to explain the mechanism of ...............
Answer» SOLUTION :HETEROGENEOUS CATALYSIS

Discussion

10.	Intermediate involved in Reimer- Tiemann reaction is
Answer» CARBOCATION carbanion carbene free RADICAL. SOLUTION :Carbene, ACTUALLY dichlorocarbene is the electrophile INVOLVED in Reimer-Tiemann reaction.

Discussion

11.	Interhalogen compounds are more reactive than the corresponding halogens. Explain.
Answer» TWO halogens are present in place of one They are more ionic Their bond POLARITY is more than that of the HALOGEN molecule They carry more energy Answer :C

Discussion

12.	Interhalogen compounds are more reactive than the constituent halogens except fluorine - Explain.
Answer» Two halogens PRESENT in place of ONE They are more ionic Their bond POLARITY is more than that of the halogen molecule They carry more energy Answer :C

Discussion

13.	Interhalogen compounds are more reactive than the individual halogen because:
Answer» two halogens are present in place of one their bond ENERGY is less than the bond energy of the HALOGEN molecule they have polar bond they CARRY more energy Answer :C

Discussion

14.	Interhalogen compounds are compounds formed by combination of different halogen atoms. Which are more reactive, halogens or interhalogen compounds? Give reason
Answer» Solution :Interhalogen compounds are more reactive than HALOGENS `(except F_2)`. This is because the COVALENT BOND X-X' in interhalogen compound is WEAKER. than that in halogens,

Discussion

15.	Interhalogen compounds are
Answer» IONIC compounds Co-ordinated compounds Moleculor compounds Covalent compounds Answer :D

Discussion

16.	Interferon is a product of biotechnology and is used against :
Answer» VIRAL diseases Diabetes Sickle CELL anaemia Haemorrhage Answer :A

Discussion

17.	Interfering radicals interfere the testof
Answer» Group III radicalsonly Group III radicals or downward Cation which are present in group II FITRATE NONEOF these Answer :B,C

Discussion

18.	Interferon is :
Answer» TONIC Virus Carbohydrate Ore of iron Answer :B

Discussion

19.	Intereferon is connected with
Answer» Carbohydrate Virus Tonic Ore of iron Answer :B

Discussion

20.	interaction between dispersed phase and dispersion medium colloids classified on the basis ?
Answer» SOLUTION :Classification on the basis of nature of interactions between dispersed phase and DISPERSION medium. These may be classified as (i) LYOPHILIC SOLS and (II) lyophobic sols.

Discussion

21.	Intermolecular hydrogen bonds are not present in :
Answer» `CH_3COOH` `C_2H_5NH_2` `CH_3CH_2OH` `CH_3OCH_3` ANSWER :D

Discussion

22.	Inter halogens are more reactive than halogens why?
Answer» SOLUTION :The BOND in the INTER halogen X-A is weaker than A-A bond in HALOGENS. This is an account of less effective overlapping between orbitals of dissimilar atoms than those of similar atoms.

Discussion

23.	Intensity of the scattered light depends upon the difference of which of the following property of the dispersed phase and the dispersion medium ?
Answer» densities viscosities SURFACE tension refractive indices Solution :Intensity of scattered LIGHT DEPENDS upon the DIFFERENCE of refactive indices of the dispersed phase and the dispersion medium.

Discussion

24.	Integrated velocity equation for first order reaction is
Answer» `[A]_(o) = [A]e^(-kt)` `K = [A]_(o) e^(-A//t)` `Kt = 2.303 LOG ``([A]_(o))/([A])` log `([A]_(o))/([A]) = -2.303 Kt` Solution :INTEGRATED velocity EQUATION for first order REACTION is `k = (2.303)/(t)` log `((A)_(0))/((A))`.

Discussion

25.	Integrated rate expression for rate constant of first order reaction is given by k=2.303/tlog[[R]]_0/[[R]]for general reaction RtoP.Derive an expression for half life period of first order reaction.
Answer» SOLUTION :`k=2.303/tlog[[R]]_0/[[R]]`At half life PERIOD, t=t_(1/2)`and `[R]=[R]_0\2` therefore`t_(1/2)`=2.303/klog`([[R]]_0/[[R]])/2t_(1/2)2.303/klog2=0.693/k`

Discussion

26.	Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories ?
Answer» an ENZYME A HORMONE A co-enzyme An antibiotic. Answer :B

Discussion

27.	Insulin regulate the metabolism of
Answer» minerals amino acids glucose vitamins Answer :C

Discussion

28.	Insulin regulates the metabolism of
Answer» minerals amino acids GLUCOSE vitamins Solution :Insulin is ESSENTIAL for metabolism of carbohydrates in the body. It facilitates the entry of glucose into the cells by INCREASING the penetration of CELL membranes and phosphorylation of glucose.This DECREASES glucose concentration in blood.

Discussion

29.	Insulin is dissolved in a suitable solvent and the osmotic pressure (pi) of solutions of various concentration (g//cm^3) C is measured at 20^@C. The slope of a plote of pi against C is found to be 4.65xx10^(-3) . The molecular weight of the insulin is :-
Answer» `3xx10^5` `9xx10^5` `4.5xx10^5` `5.16xx10^6` SOLUTION :`pi=w/mxx(RT)/V` slope = `(RT)/M` `M=(RT)/"slope"=(0.0821xx293)/(4.65xx10^(-3)xx10^(-3))=5.16xx10^6` g

Discussion

30.	Insulin is dissolved in a suitable solvent and the osmotic pressure (TT) of solutions of various concentration (g//cm^(3)) C is measured at 20^(@)C. The slope of a plote of TT against C is found to be 4.65xx10^(-3). The molecular weight of the insulin is
Answer» `3xx10^(5)` `9xx10^(5)` `4.5xx10^(5)` `5.16xx10^(6)` Solution :`pi=w/mxx(RT)/V` slope`=(RT)/M` `M=(RT)/("slope")=(0.0821xx293)/(4.65xx10^(-3)xx10^(-3))=5.16xx10^(6)G`

Discussion

31.	Insulin is secreted from
Answer» thyroid adrenal body pancreas liver Answer :C

Discussion

32.	Insulin is secreted from :
Answer» Thyroid Pancreas Adrenal body Cellular membrane. Solution :INSULIN is SECRETED from pancreas.

Discussion

33.	Insulin is dissolved in a suitable solvent and the osmotic pressure pi in atm of solutions of various concentrations C in g//cm^(3) is measured at 27^(@) C. The slope of plot of pi against C is found to be 4.1 xx 10^(-3) atm cm^(3)g^(-1). The molecular mass of insulin is:
Answer» `6 xx 10^(3)` `3 xx 10^(6)` `6 xx 10^(6)` `3 xx 10^(3)` ANSWER :C

Discussion

34.	Insulin is an example of ___ hormone.
Answer» PARACRINE ENDOCRINE AUTOCRINE NONE of the above SOLUTION :endocrine

Discussion

35.	Insulin is a protein whichplays the role of ………. .
Answer» an ANTIBODY a hormone an ENZYME a TRANSPORTING AGENT Answer :B

Discussion

36.	Insulin is a
Answer» Non STEROIDAL, PEPTIDE hormone Steroidal, peptide hormone Non steroidal ,amino acid hormone Steroidal amino acid derivative hormone ANSWER :A

Discussion

37.	Insulin is a homopolymer of _____.
Answer» ANSWER :FRUCTOSE

Discussion

38.	Insulin is
Answer» POLYMER of `ALPHA`-AMINO acid Monomer of `alpha`-amino acid Polymer of `BETA`-amino acid Monomer of `beta`-amino acid Answer :A

Discussion

39.	Insulin has 51 amino acids in two polypeptide chains which are linked by :
Answer» ONE SULPHIDE bond One DISULPHIDE bond Two disulphide bonds Three disulphide Answer :C

Discussion

40.	Insulin contains 3.4% sulphur. Then, the minimum molecular mass of the insulin in about.
Answer» 940amu 9400amu 3600amu 970amu Solution :3.4g SULPHUR is present in 100g INSULIN `THEREFORE 32G` sulphur will be present in `(100)/(3.4)xx32g` insulin=940 `therefore` Molar mass of insulin is about 940 amu

Discussion

41.	Insulincontains 3.4%sulphur. The minimummolecular weightof insulin is
Answer» 350 470 560 940 Solution :Minimum mas of sulphur `= wt.` of its one atom `= 32` `:' 3.4 GM` of sulphur PRESENT in `100 gm`. `:' 32 gm` of sulphur present in `= (100xx 32)/(3.4) = 940 gm`.

Discussion

42.	Insulin contains 3.4% sulphur. The minimum molecular weight of insulin is
Answer» 944 941.176 945.27 None Answer :B

Discussion

43.	Insulin (C_(2)H_(10)O_(5))_(n) is dissolved in a suitable solvent and the osmotic pressure (pi) of solutions of various concentrations (C) is measured at 20^(@)C. The slope of the plot of pi (atm) versus C (in g//cm^(3)) is found to be 4.65xx10^(-3). The molecular weight of insulin is
Answer» `3.17xx10^(6)` `4.17xx10^(6)` `5.17xx10^(6)` `6.17xx10^(6)` Solution :`pi=C'RT`. HENCE CONCENTRATION C' is in `"MOL L"^(-1)` To convert `"g cm"^(-3)` into `"mol L"^(-1)`, wehave Thus, C' in the formula should be replaced by this factor, i.e., `pi=(Cxx1000)/(M_(2))RT=(1000RT)/(M_(2))C` Thus, a plot of `pi` VS C will be linear with SLOPE `=(1000RT)/(M_(2))=4.65xx10^(-3)"(Given)"` `therefore (1000xx0.0821xx293)/(M_(2))=4.65xx10^(-3)` `"or"M_(2)=5.17xx10^(6)`

Discussion

44.	Insulin contain 3.4% sulphur. Calculate the minimum mass of insullin.
Answer» Solution :Minimum MOLECULAR MASS of INSULIN will be the mass containing at least ONE ATOM of sulphur. But one atoms of S = 32 amu Given that 3.4 amu of sulphur is present in 100 amu of insulin `therefore"32 amu of sulphur will be present in insulin"=(100)/(3.4)xx32=941.2amu` Hence, minimum mass of insulin = 941.2 amu.

Discussion

45.	Insulin conatains3.4% sulphur .The minimum mol. Weight of insulin is :
Answer» 941.176 944 945.27 None Answer :A

Discussion

46.	Insulin, (C_(2)H_(10)O_(5))_(n) is dissolved in a suitable solvent and the osmotic pressure (pi) of solutions of various cocentrations ("g cm"^(-3)) is measured at 20^(@)C. The slope of the plot of pi against C is found to be 4.65xx10^(-3). Calculate the molecular mass of insulin.
Answer» Solution :`pi="CRT where C = MOLAR conc. "("mol L"^(-1))` Given values of C (say C') are in `"g cm"^(-3)`. To CONVERT then into `"mol L"^(-1),` we have `C=(C')/(M_(2))xx1000` `therefore""pi=(1000C')/(M_(2))xxRT.` It is like `y=mx` Hence, plot of `pi " vs " C'` will be LINEAR with slope `=(1000RT)/(M_(2))` `therefore(1000RT)/(M_(2))=4.65xx10^(-3)"or"M_(2)=(1000RT)/(4.65xx10^(-3))=(1000xx0.0821xx293)/(4.65xx10^(-3))=5.17xx10^(6)`

Discussion

47.	Insulin (C_2H_10O_5)_n is dissolved in a suitable solvent and osmotic pressure (pi) of solutions of various concentrations (g cm^-3) C is measured at 20^@C. The slope of a plot of pi against C is found to be 4.65xx10^-3. The molecular weight of the insulin is:
Answer» `4.8xx10^5` `9xx10^5` `3xx10^5` `5.16xx10^6` ANSWER :D

Discussion

48.	Insulin , a protein acts as
Answer» An antibody A hormone An enzyme A TRANSPORT AGENT ANSWER :B

Discussion

49.	Insulin, a hormonechemically is ………… ..
Answer» TACGAACT TCCGAACT TACGTACT TACGRAGT Answer :A

Discussion

50.	Instead of principal quantum number (n), azimuthal quantum number (l) & magnetic quantum number (m), a set of new quantum number s, t & u was introduced with similar logic but different values as defined below s = 1, 2, 3,.......oo all positive integral values. t = (s^(2) - 1^(2)), (s^(2) - 2^(2)), (s^(2) - 3^(2)).........No negative value u = - ((t + 1))/(2) "to" + ((t + 1))/(2) (including zero, if any) in integral steps. Each orbital can have maximum four electrons. (s + t) rule is defined, similar to (n + l) rule. Number of electrons foe which s = 2, t = 3 for an element with atomic number 24
Answer» 8 4 0 None of these Solution :`{:(s = 1,t = 0,u = - (1)/(2)","(1)/(2),),(s = 2,t = 0,u = - (1)/(2)","(1)/(2),),(,t = 3,u = - 2"," -1"," 0","+1","+2 ,),(s = 3,t = 0,u = - (1)/(2)","(1)/(2),),(,t = 5,u = -3"," -2"," -1"," 0"," +1"," +2"," +3,),(,t = 8,u = - (9)/(2) "," - (7)/(2)"," - (5)/(2)"," - (3)/(2)"," - (1)/(2)"," (1)/(2)"," (3)/(2)"," (5)/(2)"," (7)/(2)"," (9)/(2),):}` According to `(s + t)` rule INCREASING order of ENERGY 1s 2s 3s 4s 2f 5s `{:((i),"NUMBER of electron in " s = 2,7 xx 4 = 28,,),(,"Number of electron in " s = 3,19 xx 4 = 76,"Hence (B)",):}` `{:((ii),"For " Z = 24,1s^(8) 2s^(8) 3s^(8) " i.e. number electrons (s) in " s = 2,t = 3 ""[2f^(@)] = 0,),(,"Hence" (C),,,):}`

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Intermolecular forces between two benzene molecules are nearly of same strength as those between two toluene molecules. For a mixture of benzene and toluene, which of the following are not true?

Intermolecular attractions among the moleules of any gas are minimum at

Intermolecular dehydration of alcohols gives :

Intermolecular dehydration of alcohol gives

Intermediates formed during the reaction of RCONH_2 with Br_2and KOH are :

Intermediate product of hydrolysis of cyanide is

Intermediate.

Intermediate product formed in the acid catalysed dehydration of n-propyl alcohol is:

Intermediate compound formation theory is unable to explain the mechanism of ...............

Intermediate involved in Reimer- Tiemann reaction is

Interhalogen compounds are more reactive than the corresponding halogens. Explain.

Interhalogen compounds are more reactive than the constituent halogens except fluorine - Explain.

Interhalogen compounds are more reactive than the individual halogen because:

Interhalogen compounds are compounds formed by combination of different halogen atoms. Which are more reactive, halogens or interhalogen compounds? Give reason

Interhalogen compounds are

Interferon is a product of biotechnology and is used against :

Interfering radicals interfere the testof

Interferon is :

Intereferon is connected with

interaction between dispersed phase and dispersion medium colloids classified on the basis ?

Intermolecular hydrogen bonds are not present in :

Inter halogens are more reactive than halogens why?

Intensity of the scattered light depends upon the difference of which of the following property of the dispersed phase and the dispersion medium ?

Integrated velocity equation for first order reaction is

Integrated rate expression for rate constant of first order reaction is given by k=2.303/tlog[[R]]_0/[[R]]for general reaction RtoP.Derive an expression for half life period of first order reaction.

Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories ?

Insulin regulate the metabolism of

Insulin regulates the metabolism of

Insulin is dissolved in a suitable solvent and the osmotic pressure (pi) of solutions of various concentration (g//cm​^3​) C is measured at 20^@C. The slope of a plote of pi against C is found to be 4.65xx10^(-3) ​. The molecular weight of the insulin is :-

Insulin is dissolved in a suitable solvent and the osmotic pressure (TT) of solutions of various concentration (g//cm^(3)) C is measured at 20^(@)C. The slope of a plote of TT against C is found to be 4.65xx10^(-3). The molecular weight of the insulin is

Insulin is secreted from

Insulin is secreted from :

Insulin is dissolved in a suitable solvent and the osmotic pressure pi in atm of solutions of various concentrations C in g//cm^(3) is measured at 27^(@) C. The slope of plot of pi against C is found to be 4.1 xx 10^(-3) atm cm^(3)g^(-1). The molecular mass of insulin is:

Insulin is an example of ___ hormone.

Insulin is a protein whichplays the role of ………. .

Insulin is a

Insulin is a homopolymer of _____.

Insulin is

Insulin has 51 amino acids in two polypeptide chains which are linked by :

Insulin contains 3.4% sulphur. Then, the minimum molecular mass of the insulin in about.

Insulincontains 3.4%sulphur. The minimummolecular weightof insulin is

Insulin contains 3.4% sulphur. The minimum molecular weight of insulin is

Insulin (C_(2)H_(10)O_(5))_(n) is dissolved in a suitable solvent and the osmotic pressure (pi) of solutions of various concentrations (C) is measured at 20^(@)C. The slope of the plot of pi (atm) versus C (in g//cm^(3)) is found to be 4.65xx10^(-3). The molecular weight of insulin is

Insulin contain 3.4% sulphur. Calculate the minimum mass of insullin.

Insulin conatains3.4% sulphur .The minimum mol. Weight of insulin is :

Insulin, (C_(2)H_(10)O_(5))_(n) is dissolved in a suitable solvent and the osmotic pressure (pi) of solutions of various cocentrations ("g cm"^(-3)) is measured at 20^(@)C. The slope of the plot of pi against C is found to be 4.65xx10^(-3). Calculate the molecular mass of insulin.

Insulin (C_2H_10O_5)_n is dissolved in a suitable solvent and osmotic pressure (pi) of solutions of various concentrations (g cm^-3) C is measured at 20^@C. The slope of a plot of pi against C is found to be 4.65xx10^-3. The molecular weight of the insulin is:

Insulin , a protein acts as

Insulin, a hormonechemically is ………… ..

Insulin is dissolved in a suitable solvent and the osmotic pressure (pi) of solutions of various concentration (g//cm^3) C is measured at 20^@C. The slope of a plote of pi against C is found to be 4.65xx10^(-3) . The molecular weight of the insulin is :-