Chemistry MCQs Online Quiz Test 32

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9th Class Objective Type Chemistry MCQs Quiz Test

Q.1: If temperature of gallium arsenide is increased then its conductivity will———-?

  1. decrease
  2. increase
  3. remains constant
  4. first decreases then increases

B

Q.2: Which of the following will decompose to produce litharge———?

  1. Pb2O
  2. PbO2
  3. Pb3O4
  4. All of the above

C

Q.3: Which of the following is metasilicic acid ?

  1. H2SnO3
  2. H2SiO3
  3. H3AsO4
  4. H3SbO4

B

Q.4: Boron in soil has been considered micronutrient for———?

  1. Soil porocity
  2. Proper growth of plants
  3. Alkalinity of soil
  4. All Of Above

B

Q.5: Substance which is found in dried up lakes of Tibet and California is——–?

  1. Tincal
  2. Boric acid
  3. Calcium carbonate
  4. Colemanite

A

Q.6: Which of the following does not give Borax bead test ?

  1. Cu
  2. Cr
  3. Ni
  4. A1

D

Q.7: The metal which is used in thermite process because of its activity is———-?

  1. iron
  2. copper
  3. aluminium
  4. zinc

C

Q.8: Ozonolysis of benzene produces———-?

  1. Glycol
  2. Glyoxal
  3. Vicinal diol
  4. Both B And C

B

Q.9: Boron is non-netal whereas A1 is metal. It is due to————?

  1. Small size
  2. High nuclear charge
  3. Both A and B
  4. No authorized justification yet

C

Q.10: One of the outstanding features of boron is its ability to form———?

  1. Molecular addition compounds
  2. Molecular crystals
  3. Semiconductors
  4. Ionic compounds

A