Chemistry, 07.06.2021 04:40 XxalyxX3487
1. Which of the following elements will form an acidic oxide?
(a) An element with atomic number 7
(b) An element with atomic number 3.
(c) An element with atomic number 12
(d) An element with atomic number 19
2. Which of the following elements does not lose an electron easily?
(b) F
(c) Mg
(d) A
3. The set representing correct order of ionic radius is
(a) LT > Bez-> Na > Mg2-
(b) Na > LI > Mg? > Be2-
(c) L' > Na > Mg? > Be2-
(d) Mg2+ > Be? > > Na
4. Lithium is the strongest reducing agent among alkali metals due to which of the following factor
(a) Low ionization energy
(b) High electron affinity
(c) Low hydration energy
(d) High lattice energy
5. In flame test, which of the following is the colour of the flame by sodium salt?
(a) Na
(b) Red
(c) Violet
(a) Green
(d) Yellow
6. Which of the following is used for filling balloons?
(C) Argon
(b) Neon
(a) Helium
(d) Xenon
7. The radioactive noble gas is
(b) helium
(c) radon
(a) argon
(d) krypton​
Answers: 3
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You know the right answer?
1. Which of the following elements will form an acidic oxide?
(a) An element with atomic number 7
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