Chemistry, 17.11.2020 08:50 jonellelewis2897

A. Which non-metal is essential for our life and all living beings inhale it during breathing? B. Whichnon-metal is used to disinfect water?

2.A purple coloured non-metal forms a brown solution in alcohol which is applied on wounds as an antiseptic. Name the non-metal.

Give reasons for the following.

(a)Aluminium foils are used to wrap food items.

(b)Immersion rods for heating liquids are made up of metallic substances.

(c)Sodium and potassium are stored in kerosene.

4. What is the nature (acidic or basic )of the following oxides ?a. Magnesium oxide (b) Sulphur dioxideGive reason foryour choice.

5. When a copper metal is exposed to moist air for a long time, then a green coating is formed on its surface .What is the green material formed on its surface. Support your answer with word equation. Is it acidic or basic in nature.

PLEASE HELP ME

Answers: 1

Show answers

Another question on Chemistry

Chemistry, 22.06.2019 01:30

Reaction rate depends on how many molecules are coming into contact with each other with enough energy to react. increasing the temperature of the reactants will increase -

Answers: 3

Answer

Chemistry, 22.06.2019 17:30

What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.

Answers: 1

Answer

Chemistry, 22.06.2019 22:30

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt

Answers: 1

Answer

Chemistry, 23.06.2019 00:30

Element j is 1s 2s 2p 3s . (i) how many unpaired electrons does j have? (ii) is j a good oxidizing agent or a reducing agent? (iii) state reason for the answer.

Answers: 1

Answer

You know the right answer?

A. Which non-metal is essential for our life and all living beings inhale it during breathing? B. W...

Questions