21.

Which one of the following is known as Bayer's Reagent?

• Dilute alkaline solution of potassium permanganate

• Concentrate acidic solution of potassium permanganate

• Acidic solution of potassium permanganate

• Neutral solution of potassium permanganate

Most appropriate formative task to assess the student's understanding of data analysis is

• Role play

• Crossword

• Survey-based project

• Quiz

The projectors which are used to show opaque figures and pages of books are called

• Epidiascope

• Telescope

• Bioscope

• Radioscope

Which of the following is not an activity-based teaching method?

• Demonstration Method

• Observation Method

• Heuristic Method

• Lecture Method

Do we use to perform which of the following to test a hypothesis?

• Experiment

• Examination

• Evaluation

• Result

'Inquiry method' is also known as

• Problem-solving Method

• Collection Method

• Heuristic Method

• Classification Method

While teaching "Flower of Brassica campestris", which of the following would be the best-suited method?

• Observation Method

• Lecture Method

• Field Trip Method

• Discussion Method

The vertical component of Earth's magnetic field is zero at

• magnetic poles

• geographic poles

• everywhere

• magnetic equator

Which is the formula of potash alum?

• (NH₄)₂SO₄ ⋅ Fe(SO₄)₃ ⋅ 24H₂ O

• (NH₄)₂SO₂ ⋅ Al₂(SO₄)₃ ⋅ 24H₂ O

• K₂SO₄ ⋅ Al₂(SO₄)₃ ⋅ 24H₂O

• K₂SO₄ ⋅ Cr₂(SO₄)₃ ⋅ 24H₂O