An element X forms an oxide which turns red litmus blue. Identify whether X is a metal or non-metal.
An element X forms an oxide which turns red litmus blue. Identify whether X is a metal or non-metal.
1 Answers
Talk Doctor Online in Bissoy App
Which of the following statements regarding red soils of India is/are correct? 1. The colour of the soil is red due to ferric oxide content.
(b) Red soils are very poor in lime, humous and potash.
1 Answers 1 views
Name a non-metal which is lustrous and a metal which is non-lustrous.
Non-metal (lustrous) = Iodine (I) Metal (non-Iustrous) = Sodium (Na)
1 Answers 1 views
A knife, which is used to cut a fruit, was immediately dipped into water containing drops of blue litmus solution.
The fruit may be a citrus fruit or its juice may contain an acid, that is why the traces of acid remained in the knife that turned the blue litmus...
1 Answers 1 views
Two solutions X and Y are tested with universal indicator. Solution X turns orange whereas solution Y turns red.
Solution Y is a stronger acid.
1 Answers 2 views
Sugandha prepares HCI gas in her school laboratory using certain chemicals. She puts both dry and wet blue litmus papers in contact with the gas.
(i) Solid sodium chloride and conc. sulphuric acid. (ii) Dry litmus - no change Wet blue litmus - changes to red (iii) HCl +H2O→H3O+ +Cl- H3O+ - (Hydronium ion) Cl- -(Chloride Ion)
1 Answers 1 views
Acids are the substances which turn blue litmus solution red and are sour in taste. There are different types of acids like mineral acids,
(i) The acids which are obtained from plants and animals are called organic acids. Citric acid is obtained from the lemon. Vinegar contains acetic acid. (ii) Concentrated acids are very hot when they...
1 Answers 1 views
A student puts a drop of reaction mixture of a saponification reaction first on a blue litmus paper and then on a red litmus paper.
There is no change in blue litmus paper as soap solution is alkaline in nature.
1 Answers 2 views
A bag contains 6 red balls and some blue balls. If the probability of drawing a blue ball the bag is twice that of a red ball,
No of red balls = 6 Let no. of blue balls = x Total no. of possible outcomes = 6 + x(total no. of balls) P(E) = (No.of favorable outcomes)/(Total no.of possible outcomes) P(blue...
1 Answers 1 views
Dry ammonia has no action on litmus paper but a solution of ammonia in water turns red litmus paper blue. Why is it so?
In dry state Ammonia contains no hydroxyl ions. On dissolving in water, it forms NH4OH which dissociates to give NH4 + and OH-ions. Thus solution becomes basic and turns red...
1 Answers 2 views
The oxide of a metal M was water soluble. When a blue litmus strip was dipped in this solution,
The metal oxide is basic in nature. It mixes with water to form metal hydroxide as follows MO + H2O → M(OH)2 Blue litmus does not change the colour in the basic...
1 Answers 1 views