Cat 1 of General chemistry
1, The nucleus of an atom consists of
A. electrons and neutrons
B. electrons and protons
C. protons and neutrons
D. All of the above
2. The number of moles of solute present in 1 kg of a solvent is called its
A. molality
B. molarity
C. normality
D. formality
3. The most electronegative element among the following is
A. sodium
B. bromine
C. fluorine
D. oxygen
4. The number of d-electrons in Fe2+ (Z = 26) is not equal to that of
A. p-electrons in Ne(Z = 10)
B. s-electrons in Mg(Z = 12)
C. d-electrons in Fe(Z = 26)
D. p-electrons in CI(Z = 17)
5. The metallurgical process in which a metal is obtained in a fused state is called
A. smelting B. roasting C. calcinations
D. froth floatation
Cat 2 of General chemistry
1. As you move from left to right on the periodic table, what happens to the electronegativity?
a) It decreases, then increases in the last column.
b) It remains constant.
c) It increases.
d) It decreases.
e) It increases, then decreases in the last column.
2. How does ATP supply energy for cellular activities?
3. How many grams are in 4.5 moles of Li2O?
4. How to calculate normality of sodium thiosulphate?
5. Aluminum is a main-group metal and therefore loses electrons to form a cation with the same number of electrons as the nearest noble gas. Are cation atoms that have lost an electron positively charged? And is aluminum usually found in cation form? How can noble gases be used as a reference?
Cat 3 of General chemistry
1. How many unpaired electrons does oxygen have?
2. How many electrons in a Hydrogen (H) atom?
A. One
B. Two
C. Three
D. Four
3. Which is an example of a crystal lattice?
A. Plastic
B. Diamond
C. Cement
D. Sand
4. Name the forces that keep molecules together when the surrounding energy drops.
A. Friendship
B. Detraction
C. Attraction
D. Phlegmatic
Cat 4 of General chemistry
1. Cobalt - 60 is commonly used in radiation therapy because it emits
A) alpha - rays B) beta rays
C) gamma rays D) X – rays
2. When formaldehyde and potassium hydroxide are heated , we get
A) Acetylene B) Methyl alcohol
C) Methane D) Ethyl formate
3. A mixture of sand and naphthalene can be separated by
A) Fractional distillation B) Sublimation
C) Chromatography D) Any of them
4. A ‘breath test’ used by traffic police to check drunken driving uses ____?
A) Turmeric on filter paper B) Silica gel coated with silver nitrate
C) potassium permanganate-sulphuric acid D) Potassium dichromatic-sulphuric acid
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1.b, and cat 2 :4. attraction
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