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mnsoomro
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The common oxidation state of lanthanides is_________?
A. +3 B. +2 C. +1 D. +4 Submitted by :- Jamil Ahmed
Which one of the following is a bridge element?
A. Be B. Cl C. K D. P Submitted by :- Jamil Ahmed
Which group contains elements that exist as monoatomic molecule?
A. 1 B. 2 C. 14 D. 18 Submitted by :- Jamil Ahmed
The law of traids is applicable to__________?
A. Li, Be, B B. F, Cl, Br C. Cl, Br, I D. Na, K, Rb Submitted by :- Jamil…
Grignard reagent gives carboxylic acid with____________?
A. CO2 B. CH3CHO C. COC2 D. HCN Submitted by :- Jamil Ahmed
The Latin word formica means ant. The name formic acid is derived from this Latin word because__________?
A. this acid, in ancient times, was used to eliminate ant-hills B. this corrosive acid is secreted by ants to drive…
What is the structure of IF7 ?
A) Triagonal bipyramid B) Pentagonal bipyramid C) Square pyramid D) tetrahedral Submitted by :- Muhammad Nawaz
The octane number of zero is assigned to____________?
A. 2-methyl octane B. n-heptane C. iso-octane D. 3-methyl octane Submitted by :- Jamil Ahmed
The heat required to raise the temperature of body by 1 K is called___________?
A. specific heat B. thermal capacity C. water equivalent D. None of the above Submitted by :- Jamil Ahmed
Brass gets discoloured in air because of the presence of which of the following gases in air ?
A) Hydrogen sulphide B) Oxygen C) Nitrogen D) Carbon dioxide Submitted by :- Muhammad Nawaz