Elements which emit natural radioactivity are known as:
A. Radio elements
B. Active elements
C. Radioactive elements
D. Nuclear elements
Alpha (α) particles are helium (He) nucleus with a charge of:
A. e
B. 2e
C. 3e
D. 4e
Treatment of sucrose with conc. HNO3 gives:
A. Nitrosucrose
B. Glucose+ fructose
C. Oxalic acid
D. Laevulinic acid
How many isomeric aldoses are possible for the molecular formula C6H12O6?
A. 2
B. 4
C. 7
D.16
The IUPAC name of pyridines is:
A. Azolo
B. Azine
C. Azolidins
D. Diazine
The hybridization of nitrogen atom in pyridine is:
A. Sp
B. Sp2
C. Sp3
D. It is not hybridized
Which of the following compounds is not soluble in HNO3:
A. CuS
B. CdS
C. PbS
D. AgCl
The weight of a metal of equivalent of 12 which will give 0.475g of its chloride is:
A. 0.12g
B. 0.16g
C. 0.18g
D. 0.24g
When SO2 solution is passed over which of the following it turns green?
A. K2Cr2O7
B. H2SO4
C. SO3
D. P2O5
The composition of ‘ Golden spangles is:
A. PbCrO4
B. PbI2
C. As2Cr2O7
D. BaCrO4
