The amount of Zinc (at. Wt=65) necessary to produce 224 ml of H2 by the reaction with an acid will be______?
A. 0.65gm
B. 0.65gm
C. 6.5gm
D. 7.5gm
Submitted by :- Jamil Ahmed
When SO2 solution is passed over which of the following it turns green?
A. K2Cr2O7
B. H2SO4
C. SO3
D. P2O5
Submitted by :- Jamil Ahmed
The composition of ‘ Golden spangles is_________?
A. PbCrO4
B. PbI2
C. As2Cr2O7
D. BaCrO4
Submitted by :- Jamil Ahmed
What is chemical symbol for Tungsten?
A. Z
B. T
C. Tn
D. W
Submitted by :- Jamil Ahmed
Noble gases are so called zero group because they have:_________?
A. Zero Valency
B. Zero Electronegativity
C. Zero Electron Affinity
D. Both A and B
E. All of these
Submitted by :- Jamil Ahmed
In a group, atomic radii increase due to successive increase of _________ ?
A. Electronic shells
B. Proton shells
C. Neutron shells
D. Nucleus
Submitted by :- Jamil Ahmed
Chromatography is used to separate _________ ?
A. Solution
B. Mixtures
C. Molecules
D. Atoms
Submitted by :- Jamil Ahmed
In SI base units, 1 Bq is equal to __________ ?
A. 10 disintegration per second
B. 1.5 disintegration per second
C. 0.1 disintegration per second
D. 1 disintegration per second
Submitted by :- Jamil Ahmed
A helium nucleus comprising of two protons and two neutrons with a charge of 2e is _________ ?
A. Beta particle
B. Gamma particle
C. Alpha particle
D. Negative particle
Submitted by :- Jamil Ahmed
Elements which emit natural radioactivity are known as __________ ?
A. Radio elements
B. Active elements
C. Radioactive elements
D. Nuclear elements
Submitted by :- Jamil Ahmed