1. The periodic classification of the elements is an arrangement of the elements in order of their
A. atomic weights
B. isotopic weights
C. molecular weights
D. atomic numbers
2. If 1 litre of 2.2M sulphuric acid is poured into a bucket containing 10 litres of water, and the resulting solution mixed thoroughly, the resulting sulphuric acid concentration will be
A. 2.2 M
B. 1.1 M
C. 0.22 M
D. 0.11 M
3.
In the above experiment (Fig. 1) the litmus paper will initially
1. The flame used by welders in cutting metals is __.
A. butane has flame
B. acetylene flame
C. Kerosene flame
D. Oxy-acetylene flame
2. At room temperature (300k) in fig 1
A. Y is twice as soluble as X.
B. X is twice as soluble as y
C. X and Y are soluble to the same extent
D. X is three times as soluble as Y
1. An element X has two $_{10}^{20}x\text{ }\!\!~\!\!\text{ and }\!\!~\!\!\text{ }_{10}^{22}x$ in the ratio 1:3. The relative atomic mass of x would be __.
A. 20.5
B. 21.0
C. 21.5
D. 22.0
2. 200cm3 of oxygen diffuse through a porous plug in 50 seconds. How long, will 80cm3 of methane (CH4) take to diffuse through the same porous plug under the same conditions?
A. 40 sec
B. 20 sec
C. 14 sec
D. 7 sec
1. Which of the following statements is correct?
A. The average kinetic enemy of a gas is directly proportional to its temperature
B. At constant temperature, the volume of a gas increases as the pressure increases.
C. The pressure of a gas is inversely proportional to its volume.
D. The temperature of gas is directly proportional to its volume.
1. Which Question Paper Type of Chemistry is given to you?
A. Type F
B. Type E
C. Type L
D. Type S
2. A mixture is different from a compound because __.
A. the properties of a compound are those of its individual constituents while those of a mixture differ from its constituents
B. a mixture is always homogeneous while a compound is not
C. the constituent of a compound are chemically bound together while those of a mixture are not
1. Which Question Paper Type of Chemistry is given to you?
A. Type D
B. Type I
C. Type B
D. Type U
2. The presence of an impurity in substance will cause the melting point to ___.
A. be zero
B. reduce
C. increase
D. be stable
3. What volume of carbon (ll) oxide is produced by reacting excess carbon with 10 dm3 of oxygen?
A. 5 dm 3
B. 20 dm 3
1. Which Question Paper Type of Chemistry is given to you?
A. Type Green
B. Type Purple
C. Type Red
D. Type Yellow
2. Which of the following methods can be used to obtain pure water from a mixture of sand, water and methanoic acid?
A. neutralization with NaOH followed by filtration
B. neutralization with NaOH followed by distillation
C. fractional distillation
D. filtration followed by distillation
1. Which question Paper Type of Chemistry is given to you?
A. Type A
B. Type B
C. Type C
D. Type D
2. What is the concentration of a solution containing 2g of NaOH in 100cm3 of solution?
[Na = 23, O = 16, H = 1]
A. 0.40 mol dm-3
B. 0.50 mol dm-3
C. 0.05 mol dm-3
D. 0.30 mol dm-3
3. Which of the following properties is NOT peculiar to matter?
A. kinetic energy of particles increases from solid to gas
1. Which chemistry paper type is given to you
A. Type A
B. Type B
C. Type C
D. Type D
2. Which of the following is an example of a mixture?
A. Common salt
B. Blood
C. Sand
D. Washing soda
3. Calculate the percentage by mass of nitrogen in calcium trioxonitrate (V). [Ca = 40, N = 14, O = 16]
A. 8.5%
B. 13.1%
C. 17.1%
D. 27.6%