An aqueous solution of copper sulphate is acidic in nature because the salt undergoes _____.
Important Questions on Chemistry
Consider the following statements with reference to the periodic table of chemical elements.
1. Ionisation potential gradually decreases along a period.
2. In a group of elements, electron affinity decreases as the atomic weight increases.
3. In a given period, electronegativity decrease as the atomic number increases.
Which of these statement(s) is/are correct?
Assertion (A): A chemical reaction becomes faster at higher temperature.
Reason (R): At higher temperature, molecular motion becomes more rapid.
Codes:
Match List I with List II and select the correct answer using the codes given below the list.
| List I (Characteristic) | List II (Particle) |
| A. Zero mass B. Fractional charge C. Fractional spin D . Integral spin |
1. Positron 2. Neutrino 3. Quark 4. Photon |
Codes:
A B C D
Match List I (oxidation number) with List II (the element) and select the correct answer using the codes given below the lists.
| List I (Oxidation number) | List n (The elements) |
| A. 2 B. 3 C. 4 D. 6 |
1. Oxidation number of Mn in MnO2 2. Oxidation number of S in H2S207 3. Oxidation number of Ca in CaO 4. Oxidation number of A in NaAIH 4 |
Codes:
A B C D
Give below is the Assertion followed by Reason. Choose the correct relationship with the option given below.
Assertion (A): Synthetic detergents can lather well in hard water.
Reason (R): Synthetic detergents form soluble calcium and magnesium salts with hard water.
1. Ionic compounds are insoluble in alcohol.
2. Ionic compounds in the solid state are good conductor of electricity.
Which of these statements is/are correct?
