Question with Answer Chemistry
1. Which of the following is fundamental particle?
A: water molecule
B: oxygen molecule
C: alpha particle
D: proton
Correct Answer: D
2. A flask contains 36% nitrogen, 39% oxygen and 26% hydrogen. If the total pressure of the mixture of gases is 500 mm, the partial pressure of oxygen is
A: 120 mm
B: 145 mm
C: 195mm
D: 210mm
Correct Answer: C
3. Which of the following is not correct?
A: The electron affinity of chlorine is greater than fluorine.
B: The bond energy of fluorine is less than chlorine
C: Fluorine does not form oxyacids.
D: Fluorine cannot be prepared from electrolysis of metal fluorides.
Correct Answer: D
4. The movement of colloidal particles under electric field is called
A: elelctrodialysis
B: brownian movement
C: electrophoresis
D: Tyndall effect.
Correct Answer: C
5. The ionic product of water at 50 Is 4 10 -14 The pH of water is
A: 6.3 and it is acidic
B: 6.9 and it is neutral
C: 6.3 and it is almost neutral
D: 7.3 and it isbasic
Correct Answer: B
6. Which of the following is optically active ?
A: 1- chloropropane
B: 2- chloropropane
C: 1- chloropropane
D: 2- chloropropane
Correct Answer: D
7. Which is used in the preparation of azo-dyes?
A: nitrobenzene
B: aniline
C: benzaldehyde
D: chlorrobenzene.
Correct Answer: B
8. The binding energy of an atom is 128 MeV. If the binding energy per nucleon is 8 MeV, the numberof nucleons in nucleus is
A: 8
B: 12
C: 16
D: 24
Correct Answer: C
9. When benzene is oxidized in the presence of V2O5,the product is an anhydride of
A: saturated is an anhydride of
B: saturated monocarboxylic acid
C: unsaturated monocarboxlic acid
D: unsaturated dicarboxylic acid
Correct Answer: D
10. The temperature upto 2000 K is measured by
A: radiation thermometer
B: radiation pyrometer
C: gas thermometer
D: mercury thermometer.
Correct Answer: B
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