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This section includes 252 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
1. |
The end product of alcoholic fermentation is |
A. | pyruvic acid |
B. | acetaldehyde |
C. | ethyl alcohol |
D. | formic acid |
Answer» D. formic acid | |
2. |
The enzymes are killed |
A. | at a very high temperature |
B. | during chemical reaction |
C. | at low temperature |
D. | under atmospheric pressure |
Answer» B. during chemical reaction | |
3. |
Which has maximum calorific value? |
A. | Fat |
B. | Protein |
C. | Carbohydrate |
D. | Amino acid |
Answer» B. Protein | |
4. |
In which type of coal percentage of carbon is the highest? |
A. | Peat |
B. | Lignite |
C. | Bituminous |
D. | Anthracite |
Answer» E. | |
5. |
The gas is commonly used in anaesthesia |
A. | methane |
B. | nitrous oxide |
C. | nitrogen |
D. | hydrogen peroxide |
Answer» C. nitrogen | |
6. |
Which of the following could act as a propellant for rockets? |
A. | Liquid oxygen + Liquid argon |
B. | Liquid hydrogen + Liquid oxygen |
C. | Liquid nitrogen + Liquid oxygen |
D. | Liquid hydrogen + Liquid nitrogen |
Answer» C. Liquid nitrogen + Liquid oxygen | |
7. |
Candles contains a mixture of |
A. | Bees wax and paraffin wax |
B. | Bees wax and stearic acid |
C. | Paraffin wax and stearic acid |
D. | Higher fatty acid |
Answer» D. Higher fatty acid | |
8. |
C11 - L - methyl-methionine is used for |
A. | brain tumor and parathyroid imaging |
B. | stomach analysis |
C. | bone imaging |
D. | live imaging |
Answer» B. stomach analysis | |
9. |
Petroleum gas is a mixture of ethane, propane and butane. What is its major constituents? |
A. | Eathane |
B. | Propane |
C. | Butane |
D. | All three are present in equal propertions |
Answer» D. All three are present in equal propertions | |
10. |
Oils are purified by |
A. | Fractional distillation |
B. | Steam distillation |
C. | Crystallisation |
D. | Vacuum distillation |
Answer» C. Crystallisation | |
11. |
Kerosene is a mixture of |
A. | aromatic hydrocarbons |
B. | aliphatic hydrocarbons |
C. | saturated hydrocarbons |
D. | alicyclic hydrocarbons |
Answer» C. saturated hydrocarbons | |
12. |
Consider the following statements
|
A. | 1 only |
B. | 1 and 3 |
C. | 2 and 3 |
D. | 1,2, and 3 |
Answer» C. 2 and 3 | |
13. |
A mixture of CS2 and H2S on passing over heated copper gives |
A. | Methane |
B. | Ethane |
C. | Complex mixture |
D. | Propane |
Answer» B. Ethane | |
14. |
Which one of the following molecule is planar ? |
A. | NF |
B. | NCI |
C. | PH |
D. | BF |
Answer» E. | |
15. |
Which among the following is the strongest acid ? |
A. | HOCI |
B. | HCIO |
C. | HCIO |
D. | None of these |
Answer» E. | |
16. |
The fraction obtained between temperature 50-300 C during fractional distillation of crude petroleum is |
A. | Paraffin wax |
B. | Heavy oil |
C. | Kerosene |
D. | Naphtha |
Answer» D. Naphtha | |
17. |
When formic acid reacts PCI5, it forms |
A. | Acetyl chloride |
B. | Formyl chloride |
C. | Methyl chloride |
D. | Propionyl chloride |
Answer» C. Methyl chloride | |
18. |
In the complete combustion of CnH2n+2, the number of oxygen moles required is |
A. | n / 2O |
B. | (n + 1 / 2)O |
C. | (3n + 1 / 2)O |
D. | (n + 2 / 2)O |
Answer» D. (n + 2 / 2)O | |
19. |
Lindlar's catalyst is |
A. | Pt is ethanol |
B. | Pd + BaSO |
C. | Ni in ethnol |
D. | Na is liquid NH |
Answer» C. Ni in ethnol | |
20. |
The hybridization present in C2H2 is |
A. | sp |
B. | sp |
C. | sp |
D. | dsp |
Answer» B. sp | |
21. |
Consider the following statements
|
A. | 1 and 2 are correct |
B. | 1 and 3 are correct |
C. | 2 and 3 are correct |
D. | 1, 2 and 3 are correct |
Answer» B. 1 and 3 are correct | |
22. |
Match List-I with List-II and pick the correct matching form the codes given below
|
||||||||||||||||||||||||
A. | A-2, B-4, C-5, D-3, E-1 | ||||||||||||||||||||||||
B. | A-2, B-5, C-1, D-4, E-3 | ||||||||||||||||||||||||
C. | A-3, B-4, C-2, D-1, E-5 | ||||||||||||||||||||||||
D. | A-1, B-3, C-5, D-2, E-4 | ||||||||||||||||||||||||
Answer» C. A-3, B-4, C-2, D-1, E-5 | |||||||||||||||||||||||||
23. |
The name CH3 - C N is |
A. | Methyl nitrile |
B. | Ethane nitrile |
C. | Cyno ethane |
D. | None of these |
Answer» C. Cyno ethane | |
24. |
The hybridization of carbon is benzene is |
A. | sp |
B. | sp |
C. | sp |
D. | dsp |
Answer» D. dsp | |
25. |
Rectified spirit can be dried with |
A. | Conc. H |
B. | SO |
C. | CaO |
D. | Anhydrous CaCI |
E. | Slaked lime |
Answer» C. CaO | |
26. |
Match List-I (Fuel gases) with List-II (Major constituents) and select the correct answers using the codes given below the list
|
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A. | A. | |||||||||||||||||||||||||||||||||||||||||||||
B. | B. | |||||||||||||||||||||||||||||||||||||||||||||
C. | C. | |||||||||||||||||||||||||||||||||||||||||||||
D. | D. | |||||||||||||||||||||||||||||||||||||||||||||
Answer» C. C. | ||||||||||||||||||||||||||||||||||||||||||||||
27. |
Assertion (A) : The main constituent of the liquified petroleum gas in methane
|
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» E. | |
28. |
IUPAC name of CH2 = CH - CN is |
A. | Ethenenitrile |
B. | Vinyl cyanide |
C. | Cyano ethene |
D. | Prop - 2 enenitrile |
Answer» E. | |
29. |
The compound, which is used in refrigeration is |
A. | CH |
B. | CCI |
C. | CCI |
D. | F |
E. | COCI |
Answer» D. F | |
30. |
The antiseptic action of CHI3 is due to |
A. | Iodofrom itself |
B. | Liberation of free iodine |
C. | Partially due to iodine and partially due to CHI |
D. | itself |
E. | None of the above |
Answer» C. Partially due to iodine and partially due to CHI | |
31. |
The vapour density of a volatile substance is 4 (CH4 =1). Its molecular mass would be |
A. | 2 |
B. | 8 |
C. | 64 |
D. | 128 |
Answer» E. | |
32. |
A hybrid orbital has 25% s-character and 75% p - character. To which type of hybridization it belongs |
A. | sp |
B. | sp |
C. | sp |
D. | s |
E. | p |
Answer» B. sp | |
33. |
Assertion (A) : Large cold storage plants use ammonia as refrigerant. While domestic refrigerators use chlorofluorocarbons.
|
A. | Both A and R are true and R is the correct explanation of A |
B. | Both A and R are true but T is not the correct explanation of A |
C. | A is true but R is false |
D. | A is false but R is true |
Answer» B. Both A and R are true but T is not the correct explanation of A | |
34. |
Which one of the following can be purified by sublimation ? |
A. | F |
B. | CI |
C. | Br |
D. | I |
Answer» E. | |
35. |
Liquid benzene (C6H6) burns in oxygen according to, 2C6H6 (l) + 15O2 (g) 12CO (g) + 6H O (g) How many litre of O at STP are needed to complete the combustion of 39 g of liquid benzene ? |
A. | 11.2 litre |
B. | 22.4 litre |
C. | 84 litre |
D. | 74 litre |
Answer» D. 74 litre | |
36. |
Assertion (A) : Phenyl is used as a household germicide.
|
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» B. Both A and R are true but R is not the correct explanation of A | |
37. |
What is the name of the following alkyl group ? (CH3)2 CH |
A. | Normal propyl |
B. | Isopropyl |
C. | Sec. propyl |
D. | Tert. propyl |
Answer» C. Sec. propyl | |
38. |
Match List - I (Industrial process) with List - II (Industry with which associated) and select the correct answer using the code given below the lists
|
|||||||||||||||||||||||||||||||||||||||||||||
A. | A. | |||||||||||||||||||||||||||||||||||||||||||||
B. | B. | |||||||||||||||||||||||||||||||||||||||||||||
C. | C. | |||||||||||||||||||||||||||||||||||||||||||||
D. | D. | |||||||||||||||||||||||||||||||||||||||||||||
Answer» C. C. | ||||||||||||||||||||||||||||||||||||||||||||||
39. |
Glucose and fructose are converted into C2H5OH in presence of |
A. | Invertase |
B. | Diastase |
C. | Zymase |
D. | Lipids |
Answer» D. Lipids | |
40. |
IUPAC name of CH3CHO is |
A. | Acetaldehyde |
B. | Ethanal |
C. | Methyl aldehyde |
D. | Formalin |
Answer» C. Methyl aldehyde | |
41. |
General formula CnH2n-2 represents |
A. | Alkenes |
B. | Alkanes |
C. | Alkynes |
D. | None |
Answer» D. None | |
42. |
Which is the correct formula of bleaching powder ? |
A. | Ca(OCI)CI |
B. | CaO(OCI) |
C. | Ca(OCI) |
D. | Ca(OCI) |
E. | CI |
Answer» B. CaO(OCI) | |
43. |
The compound CH3COOC2H5 belongs to the class |
A. | Alkanals |
B. | Alkanones |
C. | Alkyle alkanoates |
D. | Alkanediols |
Answer» D. Alkanediols | |
44. |
Nitrogen containing organic compound when fused with sodium metal forms |
A. | NaNO |
B. | NaCN |
C. | NaNH |
D. | NaNC |
Answer» C. NaNH | |
45. |
Successive alkens differ by |
A. | CH |
B. | CH |
C. | CH |
D. | C |
E. | H |
Answer» B. CH | |
46. |
Petroleum is found |
A. | On the surface of the earth |
B. | In the atmosphere |
C. | In arctic ocean |
D. | Deep under the surface of the earth |
Answer» E. | |
47. |
Benzene is a polymer of |
A. | Methane |
B. | Acetylene |
C. | Ethane |
D. | Ethylene |
Answer» C. Ethane | |
48. |
Naphthalene is a volatile solid it is best purified by |
A. | Crystallisation |
B. | Distillation |
C. | Steam distillation |
D. | Sublimation |
Answer» E. | |
49. |
A mixture of CS |
A. | Methane |
B. | Ethane |
C. | Complex mixture |
D. | Propane |
Answer» B. Ethane | |
50. |
The couple between base units of DNA is through |
A. | Hydrogen bonding |
B. | Electrostatic bonding |
C. | Covalent bonding |
D. | van der Waal's forces |
Answer» B. Electrostatic bonding | |