1. The two types of litmus paper are:-Ans- (d) blue and red2. Non-metallic oxides react with water to form:Ans- (a) acids3. Slaked lime is a common name of:Ans- (b) calcium hydroxide4. The base used in antacid is:Ans- (a) magnesium hydroxide5. What is the salt in the reaction: NaOH + HCl ... Read More

Given :The given numbers are 30 and 40.To find :We have to find the perfect square numbers between 30 and 40.Solution :Natural numbers that are squares of other natural numbers are called perfect squares or square numbers.$1^2 = 1; 2^2 = 4; 3^2 = 9; 4^2 = 16; 5^2 = 25; 6^2 = 36; 7^2 = 49; 8^2 = 64; 9^2 = 81; 10^2 = 100 $36 is the only perfect square number between the numbers 30 and 40.

Water resources are natural resources of water that are potentially useful. It is important because it is needed for life to exist.Uses of water include agricultural, industrial, household, recreational and environmental activities.All living things require water to grow.

Polycarbonates are a group of thermoplastic polymers containing carbonate groups in their chemical structures. Uses: They are used in engineering as they are strong, tough materials, and some grades are optically transparent. They are easily worked, molded, and thermoformed.They are mainly used for electronic applications that capitalize on their collective safety features. Being ... Read More

The radius of the orbit = 42350km  Circumference of the orbit = 2$\pi$r                                                 =$2\times3.14\times42350$                                                 =2.66×105 kmThe time taken to complete one revolution around the earth is 24 hourSPEED = $\frac{DISTANCE}{TIME}$                          =$\frac{2.66\times 10^{5}}{24}$                           =$11083.333$km/h

Classification is a method of grouping, in which we place similar things together in one group according to its physical appearance, texture, nature of origin, etc.Example: Arrangement of books in a library. In a library, books on the same subject are placed together, so that it will not be difficult ... Read More

Jute is a rainy season crop that requires a hot and humid climate. High temperature between 24 to 35 degree Celsius, rainfall between 120 to 150 cm and humidity of around 80 to 90% is required for the growth of Jute.The humid climate is suitable for its germination and it ... Read More

Given : The given expression is $2x+ \frac{5}{7}=\frac{9}{14}$.To do :We have to find the value of x.Solution :$2x+ \frac{5}{7}=\frac{9}{14}$$2x = \frac{9}{14} - \frac{5}{7}$$2x = \frac{9}{14} - \frac{5 \times 2}{7 \times 2}$$2x = \frac{9-10}{14}$$2x = \frac{-1}{14}$$x = \frac{-1}{28}$The value of x is $-\frac{1}{28}$.              

A corrosive substance is one that will damage or destroy other substances with which it comes into contact by means of a chemical reaction.Examples include strong acids which are corrosive to our skin.

A curved mirror is a mirror with a curved reflecting surface. The surface may be either convex or concave. Most curved mirrors have surfaces that are shaped like part of a sphere, but other shapes are sometimes used in optical devices