Radius of first orbit of hydrogen is 0.53°A. Which orbit has a radius of 4.77°A:
a)First
b)Second
c)Third
d)Fourth
Which of the following is an example of tertiary alkyl halide:
a)2-bromo-3-methyl butane
b)2-bromo-2-methyl butane
c)2-chloro butane
d)1-chloro methyl pentane
Dry distillation of which of the following can be done to produce acetone:
a)Calcium acetate
b)Acetic acid
c)Ethyl acetate
d)Calcium formate
Which of the following is formed when formaldehyde is treated with oxidizing mixture ( H2SO4+ K2Cr2O7 ):
a)Methanol
b)Methanolic acid
c)Acetone
d)Acetaldehyde
Which of the following will give iodoform reaction on the treatment with Na2CO3 & I2:
a)Methanol
b)Acetic acid
c)Acetic anhydride
d)Acetone
Which of the following is formed when excess of ethyl alcohol is treated with concentrated H2SO4 at a low temperature:
a)Dimethyl ether
b)Acetylene
c)Ethene
d)Diethyl ether
Which of the following reaction can be used for the conversion of ethyl alcohol into acetaldehyde:
a)Polymerization
b)Esterification
c)Dehydrogenation
d)Reduction
Polygenic inheritance forms the bases of:
a)Codominance
b)Continuous variation
c)Discontinuous variation
d)Incomplete dominance
In humans beings multiple alleles control inheritance of:
a)Blood groups
b)Colour blindness
c)Sickle cell anaemia
d)Phenylketonuria
Which of the following is a disease in which the blood fails to clot:
a)Diabetics
b)Colour blindness
c)Alkaptonuria
d)Haemophilia
