Science (Chemistry )

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Q1 :- Which Of the following is a strong acid ?

Q2:-Which of the following indicators turn red in an acidic solution? 1)Phenolphthalein 2) Litmus 3)Turm4) Methyl orange (Choose the correct option.)

Q3 :- Some fruits like mango, lemon, raw grapes, orange, etc., have a sour taste due to the presence of:

Q4 :- Which of the following is not an property of acid

Q5 :-An ant’s sting can be treated with …………which will neutralise the effect of the chemical injected by the ant’s sting into our skin. Choose the correct option from the following to be filled in the blank space:

Q6 :- Brine is an

Q7 :- At what temperature is gypsum heated to form Plaster of Paris?

Q8 :- Which one of the following will turn blue litmus to red?

Q9 :- Which one of the given acids is used in the treatment of bone marrow and scurvy diseases?

Q10 :- Acid present in apple is :

Q11 :- which of the following is made up of bases ?

Q12 :- Lime water reacts with chlorine to give

Q13 :- Which of the following is a mineral acid?

Q14 :- Rain is called acid rain when its:

Q15 :- An aqueous solution with pH = 1 is

Q16 :- Which one of the given is commonly known as blue vitriol and is used as a fungicide?

Q17 :- What Should be applied to get relief from the bite of honeybee ?

Q18 :- To protect tooth decay we are advised to brush our teeth regularly. The nature of the tooth paste commonly used is

Q19 :- The pH of the gastric juices released during digestion is

Q20 :- Which one of the following can be used as an acid - base indicator by a visually impaired student ?