A liquid that will dissolve fat is
hydrochloric acid
calcium hydrochloride
kerosene
water
Correct answer is C
Kerosene is only liquid that will dissolve fat. Option A,B,D will not dissolve fat because of their chemical composition
In the production of soap, concentrated sodium chloride solution is added to
increase the solubility of soap
decrease the solubility of the soap
saponify the soap
emulsify the soap
Correct answer is B
Concentrated sodium chloride solution will the solubility of soap along the course of soap production. Options A,C,D are not appropriate
Which of the following metals burns with brick red
Pb
Ca
Na
Mg
Correct answer is B
Calcium is the only metal that burn with brick red flame. Option A,C,D will not burn with brick red flame rather burn with brick blue flame
The above orbital diagram shown the electronic configuration of
chlorine
nitrogen
calcium
neon
Correct answer is B
Nitrogen has an electronic configuration of 7 i.e
1s2 2ps2 2p3. option A,C,D are chlorine 17, calcium 20, neon 10
39.3dm 3
22.4dm3
4.93dm3
3.93dm3
0.393dm3
Correct answer is D
V\(_1\) = 2.12dm\(^3\), V\(_2\) = ?
P\(_1\) = 205.2 x 10\(^3\) Nm\(^{-2}\), P\(_2\) = 101.3 x 10\(^3\) Nm\(^{-2}\)
T\(_1\) = 293K, T\(_2\) = 273K
Using \(\frac{P_1 * V_1}{T_1}\) = \(\frac{P_2 * V_2}{T_2}\)
: V\(_2\) = \(\frac{P_1 * V_1 * T_2}{P_2 * T_1}\)
→ \(\frac{205.2 x 10^3 * 2.12 * 273}{101.3 x 10^3 * 293}\)
= 4.0dm\(^3\)
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