Question : The correct order of electron affinity of Halogens is –
Option 1: F < I < Br < Cl
Option 2: I < Br < Cl < F
Option 3: I < Br < F < Cl
Option 4: I > Br > F > Cl
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Correct Answer: I < Br < F < Cl
Solution : The correct option is I < Br < F < Cl.
The electron affinity of an element is the energy change that occurs when an electron is added to a neutral atom to form a negative ion. Generally, electron affinity increases across a period (from left to right) in the periodic table and decreases down a group (from top to bottom).
Chlorine has the highest affinity among all. It is because it has the largest atomic size. Iodine has the lowest affinity.
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Question : The line chart given below shows the marked price and value of the discount of 7 articles A, B, C, D, E, F, and G.
Selling price = Marked price – Discount Which of the following sequences is correct about the selling price of articles A, B, C, D, E, F, and G?
Option 1: G > A > B > C > F > E > D
Option 2: A > G > B > C > F > D > E
Option 3: G > A > B > C > F > D > E
Option 4: A > G > B > C > F > E > D
Question : If $2x-2(3+4x)<-1-2x>\frac{-5}{3}-\frac{x}{3}$; then $x$ can take which of the following values?
Option 1: 1
Option 2: 2
Option 3: –2
Option 4: –1
Question : Find the value of $\cot ^2B- \operatorname{cosec}^2B$ for $ 0<B<90^{\circ}.$
Option 1: $1$
Option 2: $2$
Option 3: $–1$
Option 4: $–2$
Question : If $a=\sqrt{6}–\sqrt{5}$, $b=\sqrt{5}–2$, and $c=2–\sqrt{3}$, then point out the correct alternative among the four alternatives given below.
Option 1: $b<a<c$
Option 2: $a<c<b$
Option 3: $b<c<a$
Option 4: $a<b<c$
Question : Which of the following is the correct order of Friction?
Option 1: Static > Rolling > Sliding
Option 2: Rolling > Static > Sliding
Option 3: Static > Sliding > Rolling
Option 4: Sliding > Static > Rolling
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