Which one of the following properties is generally not applicable to ionic hydrides?

The correct statement is

Which of the following ions will cause hardness in water?

Which of the following pairs has both the ions coloured in aqueous solution? [Atomic numbers of
\(\mathrm{Sc}=21, \mathrm{Ti}=22, \mathrm{Ni}=28, \mathrm{Cu}=29, \mathrm{Mn}=25\) ]

The general formula of a cycloalkane is

Match List-I with List-II for the following reaction pattern
Glucose \(\xrightarrow{\text { Reagent }}\) Product \(\longrightarrow\) Structural prediction
\begin{array}{|l|l|l|l|}\hline & \text{List - I (Reagents)} & & \text{List-II (Structural prediction)} \\\hline \text{a}. & \text{Acetic anhydride} & \text{(i)} & \text{Glucose has an aldehyde group} \\\hline \text{b.} & \text{Bromine water} & \text{(ii)} & \text{Glucose has a straight chain of six carbon atoms} \\\hline \text{c.} & \text{Hydroiodic acid} & \text{(iii)} & \text{Glucose has five hydroxyl group} \\\hline \text{d.} & \text{Hydrogen cyanide} & \text{(iv)} & \text{Glucose has a carbonyl group} \\\hline\end{array}

Choose the correct answer from the options given below.

The monomer used in Novolac, a polymer usedin paints

If \( \left|\begin{array}{ccc}2 a & x_{1} & y_{1} \\ 2 b & x_{2} & y_{2} \\ 2 c & x_{3} & y_{3}\end{array}\right|=\frac{a b c}{2} \neq 0 \), then the area of the triangle whose vertices are
\[
\left(\frac{x_{1}}{a}, \frac{y_{1}}{a}\right),\left(\frac{x_{2}}{b}, \frac{y_{2}}{b}\right),\left(\frac{x_{3}}{c}, \frac{y_{3}}{c}\right) \text { is }
\]

The adult animal in this phylum is radially symmetrical; but its larva exhibits bilateral symmetry.

Certain tumours are called malignant, because

For the arrangement of capacitors as shown in the circuit, the effective capacitance between the points \( A \) and \( B \) is (capacitance of each capacitor is \( 4 \mu \mathrm{F} \) )

Match the following Column I with Column II.

Column I	Column II
(A) Surgical methods	(p) Condom
(B) Barrier methods	(q) Pills
(C) Natural methods	(r) Tubectomy
(D) Chemical methods	(s) Lactational amenorrhea

Select the code for the correct answer from the options given below.

The locus of a point which moves such that the sum of its distances from two fixed points is a constant, is