Test Your Knowledge - Free MCQ PRACTICE
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DRIVINGTEST
A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.
For each of the following multiple choice questions, choose the most appropriate answer :

1. 303 RT J mol–1. The ratio of rate constant to the Arrhenius factor is
A. 0.001
B. 0.02
C. 0.1
D. 0.01

2. Acidified sodium fusion extract on addition of ferric chloride solution gives blood red colouration which confirms the presence of
A. S and Cl
B. S
C. N and S
D. N

3. An organic compound which produces a bluish green coloured flame on heating in presence of copper is
A. chlorobenzene
B. benzoic acid
C. aniline
D. benzaldehyde

4. For a stable molecule the value of bond order must be
A. negative
B. positive
C. zero
D. there is no relationship between stability and bond order.

5. What are soaps?
A. Salts of silicates
B. Esters of heavy fatty acids
C. Sodium or potassium salts of heavier fatty acids
D. Mixture of glycerol and alcohols

6. Of the following, the content of carbon is minimum in
A. steel
B. pig iron
C. wrought iron
D. cast iron

7. The yellow precipitate formed during the chromyl chloride test is chemically
A. chromic acid
B. lead acetate
C. sodium chromate
D. lead chromate

8. The IUPAC name of the complex [Co (NH3)4Cl2] Cl is
A. tetraammine dichloro cobalt (IV) chloride
B. tetraammine dichloro cobalt (III) chloride
C. dichloro tetraammine cobalt (III) chloride
D. tetraammine dichloro cobalt (II) chloride

9. Lime water contains
A. sodium hydroxide
B. calcium hydroxide
C. sodium carbonate
D. calcium chloride

10. The gas B turns potassium dichromate acidified with dilute H2SO4 to a green coloured solution C. A, B and C are respectively
A. Na2SO3, SO2, Cr2 (SO4)3
B. Na2S, SO, Cr2 (SO4)3
C. Na2SO4, SO2, Cr2 (SO4)3
D. Na2S2O3, SO2, Cr2 (SO4)3

11. The element present in the largest amount in rocks and minerals is
A. silicon
B. carbon
C. hydrogen
D. gold

12. lsobars are elements with
A. same mass number, different atomic number
B. same atomic number, different mass number
C. different number of protons
D. different number of neutrons

13. The substance most commonly used as a food preservative is
A. sodium bicarbonate
B. tartaric acid
C. acetic acid
D. benzoic acid

14. In the electrolytic refining of Zinc,
A. graphite is at the anode.
B. the metal ion gets reduced at the anode.
C. acidified zinc sulphate.is the electrolyte.
D. the impure metal is at the cathode.

15. The high-temperature superconductors are :
A. metal alloys
B. ceramic oxides
C. inorganic polymers
D. pure rare earth metals

16. How many chiral carbon atoms are present in 2, 3, 4 - trichloropentane?
A. 3
B. 1
C. 2
D. 4

17. Paracetamol
A. relieves body pain
B. is an antibiotic
C. is a sulpha drug
D. causes stomach ulcers

18. 65 coulombs of electric current is passed through fused anhydrous MgCl2. The magnesium metal thus obtained is completely converted into a Grignard reagent. The number of moles of Grignard reagent obtained is
A. 5 ´ 10–4
B. 1 ´ 10–4
C. 1 ´ 10–5
D. 5 ´ 10–5

19. 1 N aci The percentage of nitrogen in the food is
A. 8.4
B. 16.8
C. 0.84
D. 1.68

20. More acidic than ethanol is
A. CH3COCH2COCH3
B. CH3COCH3
C. CH3CH2CH2CH2CH2CH2CH2CH3
D. CH3CO2CH2CH3

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