A side effect of soft water is that
A side effect of soft water is that A. it gives offensive taste B. excess calcium is precipitated…
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The shapes of CO2, H2O and CH 4 respectively are
The shapes of CO2, H2O and CH 4 respectively are A. bent, linear and tetrahedral B. bent, tetrahedral…
The distance between the nuclei of chlorine atoms in a chlorine molecule is 0.194 mm….
The distance between the nuclei of chlorine atoms in a chlorine molecule is 0.194 mm. The atomic radius…
Which of the following types of bonding does not involve the formation of new substance?
Which of the following types of bonding does not involve the formation of new substance? A. Metallic B.…
The knowledge of half-life can be used to
The knowledge of half-life can be used to A. create an element B. detect an element C. split…
Which of the following statement is correct about the periodic table?
Which of the following statement is correct about the periodic table? A. Elements in the same period have…
The electron configuration of (_{22}X^{2+}) ion is
The electron configuration of (_{22}X^{2+}) ion is A. 1s2 2s22p6 3s2 3p6 4s2 3d2 B. 1s2 2s22p6 3s2…
The ratio of the initial to final pressure of a given mass of gas is…
The ratio of the initial to final pressure of a given mass of gas is 1:1.5. Calculate the…
The partial pressure of oxygen in a sample of air is 452 mm Hg and…
The partial pressure of oxygen in a sample of air is 452 mm Hg and the total pressure…
The fundamental difference between the three states of matter is the
The fundamental difference between the three states of matter is the A. shape of their particles B. number…