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Paper 1 | Objectives | 45 Questions
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Paper 1 | Objectives
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
D. a mixture can be represented by a chemical formula while a compound cannot
What is the percentage of sulphur in sulphur (IV) oxide?
A gas X diffuses twice as fast as gas Y. if the relative molecular mass of X is 32, calculate the relative molecular mass of Y.
200 cm3 of a gas at 25oC exerts a pressure of 700 mmHg. Calculate its pressure if its volume increase 350 cm3 at 75oC.
A. 342.53 mmHg
B. 1430.54 mmHg
C. 467.11 mmHg
D. 400.00 mmHg
An element X has electron configuration 1s2 2s2 2p6 3s2 3p5. Which of the following statements is correct about the element?
A. lt has a completely filled p-orbital
B. lt has 5 electrons in its outermost shell.
C. lt belongs to group ll on the periodic table
D. lt is a halogen
Beryllium and aluminium have similar properties because they
A. are both metals
B. belong to the same group
C. belong to the same period
D. are positioned diagonally to each other
If the difference in electronegativity of elements P and Q is 3.0. The bond that will be formed between them is
How many protons, neutrons and electrons respectively are present in the element 60/27 Co?
A. 27, 33 and 33
B. 33, 27 and 27
C. 27, 33, and 27
D. 60, 33 and 60
The radio active radiation used in studying the arrangement of particles in giant organic molecules is
A. \(\gamma\)- rays
B. \(\alpha\)- particles
D. \(\beta\) - particles
Preview displays only 9 out of the 45 Questions