Chemistry Mcqs

Ozonolysis of benzene produces___________________?

• (A)  Glycol
• (B)  Glyoxal
• (C)  Vicinal diol
• (D)  Both B & C

Answer

Submitted By :Ali Uppal

The metal which is used in thermite process because of its activity is____________________?

• (A)  iron
• (B)  copper
• (C)  aluminium
• (D)  zinc

Answer

Submitted By :Ali Uppal

Which of the following does not give Borax bead test ?

• (A)  Cu
• (B)  Cr
• (C)  Ni
• (D)  A1

Answer

Submitted By :Ali Uppal

Substance which is found in dried up lakes of Tibet and California is_______________?

• (A)  Tincal
• (B)  Boric acid
• (C)  Calcium carbonate
• (D)  Colemanite

Answer

Submitted By :Ali Uppal

Boron in soil has been considered micronutrient for_________________?

• (A)  Soil porocity
• (B)  Proper growth of plants
• (C)  Alkalinity of soil
• (D)  All

Answer

Submitted By :Ali Uppal

Which of the following is metasilicic acid ?

• (A)  H2SnO3
• (B)  H2SiO3
• (C)  H3AsO4
• (D)  H3SbO4

Answer

Submitted By :Ali Uppal

Which of the following will decompose to produce litharge_________________?

• (A)  Pb2O
• (B)  Pb3O4
• (C)  PbO2
• (D)  All of the above

Answer

Submitted By :Ali Uppal

If temperature of gallium arsenide is increased then its conductivity will___________________?

• (A)  decrease
• (B)  increase
• (C)  remains constant
• (D)  first decreases then increases

Answer

Submitted By :Ali Uppal

The coloured glassy mass in borax bead test is due to the formation of___________________?

• (A)  metal borate
• (B)  metal meta borate
• (C)  metal boride
• (D)  metal silicate

Answer

Submitted By :Ali Uppal

Boron is non metal while other elements of IIIA group are metals. This is because______________?

• (A)  it has small size
• (B)  it has high nuclear charge
• (C)  it forms molecular addition compounds
• (D)  all of the above

Answer

Submitted By :Ali Uppal