Bubbling of carbon (IV)oxide into calcium hydroxide solution results in the formation of
- A. CaCO3
- B. CuCO3
- C. ZnCO,sub>3
- D. Na2CO3
- E. MgCO3
What quantity of silver is deposited when 96500C of electricity is passed through a solution containing silver ions? (Ag = 108, 1F = 96500C)
- A. 1.08g
- B. 40g
- C. 10,.8g
- D. 21.6g
- E. 108g
The following are heavy chemicals except
- A. tetraoxosulphate (IV) acid
- B. caustic soda
- C. sodium trioxocarbonate (IV)
- D. ethene
- E. dyes
The main characteristic feature of transition metals is that they
- A. have the same atomic size
- B. are reducing agents
- C. from ions easily
- D. have variable oxidation states
- E. are highly electropositive
The following are uses of radioactive isotopes except for
- A. sterilization of medical equipment
- B. tracing reaction paths
- C. dating elements
- D. radiography
- E. determining equilibrum positions
Which of the following statements is not correct?
- A. Carbon exhibits allotropy
- B. Sulphur exhibits allotropy
- C. Chlorine exhibits allotopy
- D. Nitrogen is a gas
- E. Argon is a noble gas
Which of the following is a neutral oxide?
- A. Nitrogen (IV0 oxide
- B. Carbon (IV) oxide
- C. Sulphur (IV) oxide
- D. Phodphoorus (IV) oxide
- E. Nitrogen oxide
Which of the following types of hybridization gives rise to tetrahedral molecules?
- A. sp
- B. sp2
- C. sp3
- D. sp3d
- E. sp3d2
Which of the following is used as an anaesthetic?
- A. CHI3
- B. CHCI3
- C. CH3OH
- D. C2H5OH
- E. CHBr3
Detergents are better than soaps for laundry because
- A. detergents are synthetic while soaps are not
- B. detergents are more soluble in water than soaps
- C. scum is precipitated when soaps are used with hard water but not with stergents
- D. soaps from soluble saits with ions causing hardness of water while detergents do not
- E. soaps are in bars while detergents are in powder form
A salt which loses mass when exposed to air is
- A. hygroscopic
- B. deliquescent
- C. efflorescent
- D. fluorescent
- E. effervescent
The empirical formula of hydrocarbon containing 0. 12 mole of carbon and 0.36 mole of hydrogen is
- A. CH2
- B. CH3
- C. C2H2
- D. C2H4
- E. C2H6
Given that 32.0g sulphur contains 6.02 x 10 23 sulphur atoms how many atoms are there in 2.70g of aluminium? {Al = 27, S =32}
- A. 6.02 x 10 23
- B. 3.01 x 1022
- C. 6.02 x 1022
- D. 5. 08 x 1022
- E. 3.01 x 1022
Which of the following does not affect the rate of a chemical reaction?
- A. Addition or presence of a catalyst
- B. Size of the reacting particles
- C. The enthalpy change for the reaction
- D. Concentration of the reactants
- E. Temperatureat which the reaction is carried out
Which of the following does not affect the rate of a chemical reaction?
- A. Addition or presence of a catalyst
- B. Size of the reacting particles
- C. The enthalpy change for the reaction
- D. Concentration of the reactants
- E. Temperatureat which the reaction is carried out
Which of the following compound is aromatic?
- A. Benzene
- B. Cyclobutane
- C. Cyclopentane
- D. Hexane
- E. Ethene
The reaction represented by the equation NaOH(aq) + HCI(aq) → NaCI(aq) + H2O(/)
- A. is a double decomposition
- B. is a neutralization
- C. is reversible
- D. is usually catalysed
- E. attains equilibrium after a few seconds
The following are uses of sulphur except
- A. manufacture of tetraoxosulphate (VI) acid
- B. prevention of the growth of fungi
- C. vulcanization rubber
- D. manufacture of dyes
- E. coating of steel to prevent rusting
An acid present in proteins is
- A. lactic acid
- B. amino acid
- C. propanoic acid
- D. palmitic acid
- E. stearic acid
Equilibrium is said to be attained in reversible reaction when
- A. all the reactants have been used up
- B. all the products have been formed
- C. there is no further change in temperature
- D. the rates of the forward and backward reactions are equal
- E. the rate of formation of the products decreases with time
Copper metal will react with concentrated trioxonitrate (V) acid to give?
- A. Cu(NO3)3 + NO + N2O4 + H2O
- B. Cu(NO3)2 + NO + H2O
- C. CuO + NO2 + H2O
- D. Cu(NO3)2 + 2NO2 + 2H2O