Chemistry MCQs
Practice free Chemistry multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 1238 questions — no login required.
Question 1135easy
The compound to which H2 does not add is
Question 1136easy
Which of the following gases will effuse out of football bladder most quickly ?
Question 1137easy
In which of the following ions , the colour is not due to d-d transition ?
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Question 1138hard
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is
Question 1139easy
The metal present in vitamin B12 is
Question 1140easy
Which gas is most stable at room temperature?
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Question 1141medium
Match the List-I with List-II and select the correct answer using the codes given below
Codes :
| List-I (Vitamin) | List-II(Chemical compound) | ||
| F. | Vitamin A | 1. | Thiamin |
| G. | Vitamin B1 | 2. | Retinol |
| H. | Vitamin C | 3. | Ascorbic acid |
| J. | Vitamin E | 4. | Tocopherol |
| F | G | H | J | |
| A. | 4 | 1 | 3 | 2 |
| B. | 2 | 3 | 1 | 4 |
| C. | 4 | 3 | 1 | 2 |
| D. | 2 | 1 | 3 | 4 |
Question 1142easy
The aprotic solvent is
Question 1143hard
Match the List-I with List-II and select the correct answer using the codes given below the lists
Codes :
| List-I (Green house gas) | List-II(Major source) | ||
| F. | Carbondioxide | 1. | Enteric fermentation in cattle |
| G. | Methane | 2. | Burning of fossil |
| H. | Chloroflro carbons | 3. | Mercury compounds in waste water |
| J. | Nitrous oxide | 4. | Nylon production |
| 5. | Air conditioner and refrigeration units |
| F | G | H | J | |
| A. | 2 | 1 | 5 | 4 |
| B. | 3 | 4 | 2 | 1 |
| C. | 3 | 2 | 4 | 1 |
| D. | 1 | 2 | 3 | 4 |