Which of the following pairs are isotopes? Give reasons for your choice:

(i) ${}_{26}^{58}A$, ${}_{28}^{58}B$ or (ii) ${}_{35}^{79}X$, ${}_{35}^{80}Y$

Q.

Which of the following pairs are isobars ?

$\left(i\right){}_{26}^{58}A,{}_{28}^{58}B\left(ii\right){}_{35}^{79}X,{}_{35}^{80}Y$

Give reasons for your choice.

Q.

Which of the following pairs are isobars ?

(i) ${}_{26}{}^{58}\mathrm{A}$, ${}_{28}{}^{58}\mathrm{B}$

(ii) ${}_{35}{}^{79}\mathrm{X}$, ${}_{35}{}^{80}\mathrm{Y}$

Give reasons for your choice.

Q. Which species in each of the following pairs is better reducing agent under standard state conditions. $E^0$ values are given. Give reasons for your ?

Q.

(i)Which of the following sentences are statements. Give reasons for your answer
There are $35$ days in a month

(ii)Which of the following sentences are statements. Give reasons for your answer
Mathematics is difficult

(iii)Which of the following sentences are statements. Give reasons for your answer
The sum of $5$ and $7$ is greater than $10$

(iv)Which of the following sentences are statements. Give reasons for your answer
The square of number is even number

(v)Which of the following sentences are statements. Give reasons for your answer
The sides of a quadrilateral have equal length

(vi)Which of the following sentences are statements. Give reasons for your answer
Answer this question

(vii)Which of the following sentences are statements. Give reasons for your answer
The product of $(-1)\text{and}8\text{is}8$

(viii)Which of the following sentences are statements. Give reasons for your answer
The sum of all interior angles of a triangle is ${180}^{\circ }$

(ix)Which of the following sentences are statements. Give reasons for your answer
Today is windy day

(x)Which of the following sentences are statements. Give reasons for your answer
All real numbers are complex numbers

Q. Which species in each of the following pairs is better reducing agent under standard state conditions? Give reasons for your answer.