Chemistry
Ammonia gas is passed through quicklime and then collected in a jar. Red and blue litmus papers are placed in the jar. W, X, Y and Z are the four observations. Which of the above observations correctly shows the reaction of the litmus papers to ammonia?
| Red litmus paper | Blue litmus paper | |
|---|---|---|
| W | turns blue | remains blue |
| X | remains red | remains blue |
| Y | remains red | turns red |
| Z | turns blue | turns red |
- W
- X
- Y
- Z
Related Questions
A compound P is heated in a test tube with sodium hydroxide solution. A red litmus paper held at the mouth of the test tube turns blue. Which of the following could compound P be?
- zinc sulphate
- copper sulphate
- ferrous sulphate
- ammonium sulphate
The atomic masses of sulphur (S), oxygen (O), and helium (He) are approximately 32, 16, and 4 respectively.
Which of the following statements regarding the number of atoms in 32 g of sulphur, 16 g of oxygen, and 4 g of helium is correct?P. 16 g of oxygen contains four times the number of atoms as 4 g of helium.
Q. 16 g of oxygen contains half the number of atoms as 32 g of sulphur.
- only P
- only Q
- both P and Q
- neither P nor Q
Glucose reacts with concentrated sulphuric acid to give a very pure form of carbon called sugar charcoal.
The reaction taking place is:
- oxidation
- combustion
- dehydration
- combination
In which of the following electrolytic cells [P, Q, R or S] will silver plating be done on the spoon?
![In which of the following electrolytic cells [P, Q, R or S] will silver plating be done on the spoon? ICSE 2024 Specimen Chemistry Solved Question Paper.](https://cdn1.knowledgeboat.com/img/abp10/7/q1vi-icse-2024-specimen-chemistry-question-paper-solved-755x474.jpg)
- P
- Q
- R
- S