Welcome to your Science Quiz 32
1.
Assertion (A): A chemical reaction becomes faster at higher temperatures. [2001] Reason (R): At higher temperatures, molecular motion becomes more rapid.
2.
Which one of the following is NOT radioactive? [2001]
3.
Which one of the following is the correct sequence in increasing order of molecular weights of the hydrocarbons? [2001]
4.
In an atom, the order of filling up of the orbitals is governed by: [2001]
5.
An aqueous solution of copper sulphate is acidic in nature because the salt undergoes: [2001]
6.
Consider the following statements with reference to the Periodic Table of chemical elements: [2001]
I. Ionisation potential gradually decreases along a period.Â
II. In a group of elements, electron affinity decreases as the atomic weight increases.
III. In a given period, electronegativity decreases as the atomic number increases.Â
Which of these statement(s) is/are correct?
7.
Quartzite is metamorphosed from: [2001]
8.
Most of the explosions in mines occur due to the mixing of: [2000]
9.
Match List I with List II and select the correct answer using the codes given below the lists: [2000]
List IÂ
- German Silver
- Solder
III. Bleaching Powder
- Hypo
List II
- A) Tin
- B) Nickel
- C) Sodium
- D) Chlorine
10.
Which one of the following materials is very hard and very ductile? [2000]
