List of practice Questions

Consider the following statements : (A) Mode can be computed from histogram (B) Median is not independent of change of scale (C) Variance is independent of change of origin and scale. Which of these is / are correct ?

Consider the following statements and select the option stating which ones are true $(T)$ and which ones are false $(F)$. (i) Abortions could happen spontaneously too. (ii) Infertility is the inability to produce viable offspring due to defects in the female partner only. (iii) Complete lactation could help in contraception. (iv) Creating awareness can help create a reproductively healthy society.

Consider the following sequence of conversion. $\underbrace{2NO +O_2}_{(X)}$ $ {<=>}$ $\underset{\text{(Y)}}{ {2NO2}}$ $ {<=>[\text{Cool}][\text{heat}]}$ $\underset{\text{(Z)}}{ {N2O4}}$ $X$, $Y$ and $Z$ can be described as

Consider the following statements : (1) Measures of dispersion Range,Quartile deviation, mean deviation, variance, standard deviation are measures of dispersion Range = Maximum value - minimum values (2) Mean deviation for ungrouped data M.D. $(\bar{x}) = \frac{\sum | x_i - \bar{x} |}{n}$ M.D. $(M) = \frac{\sum | x_i - M |}{n}$ (3) Mean deviation for grouped data M.D. $(\bar{x}) = \frac{\sum \, f_i| x_i - \bar{x} |}{N}$ M.D. $(M) = \frac{\sum \, f_i | x_i - M |}{N}$ where $N = \sum \, f_i$ which of the above statements are true?

Consider the first $10$ positive integers. If we multiply each number by $-1$ and then add $1$ to each number, the variance of the numbers so obtained is

Consider the following equations : 1. A - B = A - (A $\cap$ B) 2. A = (A $\cap$ B) $\cup$ (A - B) 3. A - (B $\cup$ C) = (A - B) $\cup$ (A - C) Which of these is/are correct ?

Consider the following four statements (i) - (iv) and select the correct option stating which ones are true $(T)$ and which ones are false $(F)$. (i) In male cockroach, genital pouch or chamber lies at the hind end of abdomen bounded dorsally by $9^{th}$ and $10^{th}$ terga and ventrally by the $9^{th}$ sternum (ii) In cockroach, the haemolymph is composed of colourless plasma and haemocytes (iii) In female cockroach each ovary is formed of a group of ten ovarian tubules or ovarioles, containing a chain of developing ova (iv) In cockroach the nymph grows by moulting about $13$ times to reach the adult form

Consider the following reaction $ {C_6H_5NO_2 ->[Sn/HCl] X ->[C_6H_5COCl] Y + HCl}$ What is Y ?

Consider the dipole moments of $NH_3$ and $NF_3$.Which of the following is correct ?

Consider a titration of $ {K_2Cr_2O_7}$ solution with acidified Mohr?? salt solution using diphenylamine as indicator. The number of moles of Mohr?? salt required per mole of dichromate is

Consider Max. z = - 2x - 3y subject to $\frac{x}{2} + \frac{y}{3} \leq 1 , \frac{x}{3} \frac{y}+{2} \leq 1 , x ,y \geq 0$ The max value of z is :

Consider Minimize $z = 3x + 2y$ subject to $x + y \geq 8 $ $3x + 5y \leq 15$ $x, y \geq 0$ It has :

Conservation of momentum in a collision between particles can be understood from

Consider $A = \{1, 2\}$ and $B = \{2, 3\}$ then which of the following options is correct?

Conjoint type of vascular bundle are present in

Conjugate base of $H_2$ is

Connective tissue is

Conductivity of 0.01 M NaCl solution is $0.00147ohm^{-1} cm^{-1}$. What happens to this conductivity if extra 100 mL of $H_2O$ will be added to the above solution ?

Conductivity (unit Siemen's S) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is

Compressibility is :

Condoms are barriers that cover -

Composition of mischmetal is

Compound $C_2H_6O$ has two isomers $X$ and $Y$. On reaction with $HI$, $X$ gives alkyl iodide and water while $Y$ gives alkyl iodide and alcohol. Compounds $X$ and $Y$ are respectively

Complete the following reactions by filling the appropriate choice. (A) $6XeF_4 + 12H_2O \to 4Xe + 2XeO_3 +$ + (B) $XeF_6 + 3H_2O \to$ $+6HF$

Complete the following sentences by selecting the correct option. (A) Inspiratory capacity $(IC) = (i) + IRV$ (B) $(iii) = TV + IRV + ERV$ (C) Functional residual capacity $(FRC) = ERV + (iiii)$