The electron configuration of carbon atom in its excited state is [ 6C]
- A. 1s22s 22px12py 1
- B. 1s 2 2s 22px 22pyo
- C. 1s12s22px12py12pz1
- D. 1s 22s12px12py12pz1
Which of the following alloys does not contain copper? l. Brass II. Bronze III. Steel
- A. l only
- B. ll only
- C. lll only
- D. ll and lll only
The major product in the solvay process is
- A. NaOH
- B. Na 2CO 3
- C. NH 3
- D. H 2SO4
A consequence of global warming is
- A. air pollution
- B. flooding
- C. increased humidity
- D. low rainfall
Dry hydrogen chloride when dissolved in methylbenzene
- A. turns blue litmus paper red
- B. turns red litmus paper blue
- C. does not affect litmus paper
- D. bleaches litmus paper
Ethanol reacts with excess acidified K2Cr 2O7 to produce
- A. ethanal
- B. ethane
- C. ethanoic acid
- D. ethylethanoate
What is the product of the reaction between propene and 1 mole of hydrogen iodide?
- A. CH3CHICH3
- B. CH 3CH2CHI2
- C. CH 3CH 2CI3
- D. CH 3CHICH2I
What is the molecular formula of a compound with empirical CH2O and vapour density of 90? [H = 1, C = 12, O = 16]
- A. C4H8O 2
- B. C4H 8O3
- C. C6H10C5
- D. C6H12O6
When protein is heated to a high temperature it undergoes
- A. condensation
- B. denaturation
- C. hydrolysis
- D. polymerization
The product of the reaction between C 2H5OH and concentrated H2SO 4 at 170oC is
- A. (C2H5)2SO4
- B. CH 3CH 2HSO 4
- C. (C2H5)2O
- D. CH2 = CH 2
Which of the following raw materials is used in the plastic industry ?
- A. Calcium
- B. Ethene
- C. Hydrogen
- D. Methane
The separation of petroleum fractions depends on the differences in their
- A. boiling points
- B. molar masses
- C. melting point
- D. solubilities
Which of the following oxides of nitrogen has oxidation number of + 1?
- A. KNO3
- B. N2O
- C. N2O3
- D. NO
Consider the reaction represented by the equation: 2H2SO 4(aq0 + C(s) → 2H2O(l) + 2SO2(g) + CO 2(g) H2SO 4 is acting as
- A. a catalyst
- B. an oxidizing agent
- C. a reducing agent
- D. a sulphonating agent
Which of the following substances is the anode in the dry Leclanche cell ?
- A. Carbon rod
- B. Muslin bag
- C. The seal
- D. Zinc container
Which of the following factors will affect the rate of the reaction represented by the equation? 2HCI(aq) + CaCO 3(s) → CaCI2(aq) + H2O (I) + CO2(g) l. Pressure ll. Concentration III. Nature of reactants IV. Temperature
- A. l and ll only
- B. ll, lll and IV only
- C. l, ll and lll only
- D. l, ll, lll and IV
A catalyst increases the rate of chemical reaction by
- A. decreasing the temperature of the reaction
- B. decreasing the activation energy of the reaction
- C. increasing the surface area of the reactants
- D. decreasing the surface area of the products
Which of the following statement is correct? The solubility of
- A. gases increases with increase in temperature
- B. gases decreases with increase in temperature
- C. most solid solutes decreases with indease in temperature
- D. most solid solutes is constant
Which of the following salts is insoluble in water?
- A. Pb (NO3)2
- B. Na 2CO3
- C. AgNO3
- D. AgCI.
A solution that contains as much solute as it can dissolve at a given temperature is said to be
- A. concentrated
- B. saturated
- C. supersaturated
- D. unsaturated
Which of the following acids from normal salt only?
- A. Tetraoxosulphate (IV) acid
- B. Tetraoxophosphate (V) acid
- C. Trioxonitrate (V) acid
- D. Trioxosulphate (IV) acid