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Class 10 · Science · Medium
→Which pair will react to form salt, water and carbon dioxide?
Class 10 · Science · Medium
→When water is added to a basic solution, the number of hydroxide ions per unit volume decreases. What will be the effect on pH?
Class 10 · Science · Medium
→When water is added to an acidic solution, the number of hydrogen ions per unit volume decreases. What will be the effect on pH?
Class 10 · Science · Medium
→A universal indicator shows violet colour in a solution. What does this indicate?
Class 10 · Science · Medium
→A universal indicator shows orange colour in a solution. What could be the nature of the solution?
Class 10 · Science · Easy
→If a substance solution feels soapy and turns red litmus blue, what type is it?
Class 10 · Science · Easy
→If an aqueous solution of a substance tastes sour and turns blue litmus red, which category does it belong to?
Class 10 · Science · Medium
→A turmeric stain becomes reddish brown when soap is applied. This indicates which nature of soap?
Class 10 · Science · Medium
→Olfactory indicators give signals in acids and bases based on what change?
Class 10 · Science · Medium
→What is the safe method for diluting concentrated acid?
Class 10 · Science · Medium
→Why does the container become hot when acid is dissolved in water?
Class 10 · Science · Medium
→When can acid rain water be more harmful to aquatic organisms?
Class 10 · Science · Medium
→Why are marble statues damaged by acid rain?
Class 10 · Science · Medium
→An aqueous sugar solution does not make a bulb glow, while an acidic solution does. What is the correct reason?
Class 10 · Science · Medium
→Between equal concentration solutions of hydrochloric acid and ethanoic acid, which will have higher electrical conductivity?
Class 10 · Science · Medium
→Which statement about a strong acid and a concentrated acid is correct?
Class 10 · Science · Medium
→Plaster of Paris is formed by controlled heating of gypsum. The main change is related to what?
Class 10 · Science · Medium
→What is the most correct reason for keeping plaster of Paris away from moisture?
Class 10 · Science · Medium
→White anhydrous copper sulphate turns blue in the presence of water. In which test is this useful?
Class 10 · Science · Medium
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