Yields are usually high
Surplus produce is small
Savings are made
Farm sizes are large
Correct answer is B
Subsistence agriculture or farming is a form of farming in which nearly all the crops or livestock raised are used to maintain the farmer and farmers family, leaving little, if any, surplus for sale or trade.
In the diagram illustrated above, fertilization takes place in the part labelled
I
II
III
IV
Correct answer is A
No explanation has been provided for this answer.
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\(^3\)
64g
32g
7.1g
6.4g
3.2g
Correct answer is B
Al has valency of 3+:
3F will deposit 27g
xF will deposit 9g
cross multiply → \(\frac{9g * 3F}{27g}\)
: 1F = 9g
Cu has valency of 2+:
2F will deposit 64g
1F will deposit xg
cross multiply → \(\frac{64g * 1F}{2F}\)
: 1F = 32g
The following are s-block elements except
lithium
magnesium
potassium
calcium
aluminium
Correct answer is E
No explanation has been provided for this answer.
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