Which of the following identifier names are invalid and why? i Serial_no. ii lst_Room iii Hundred iv Total Marks v Total_Marks vi total-Marks vii _Percentage viii True

Name the type of mirror used in the following situations.

(a) Headlights of a car.

(b) Side/rear-view mirror of a vehicle.

(c) Solar furnace.

Support your answer with reason.

Write the IUPAC name of the following:

3-Methyl-3,4-dimethoxy-2-butanol

Study the following diagram of the human skull and choose the option that correctly identifies two of the labels.

A - Frontal, F - Occipital

Write the IUPAC names for the following:

1-Methylcyclohexene

• 1-Methylcyclohexene: 1-मेथाइलसाइक्लोहेक्सीन

Climate change is a long-term shift in weather conditions identified by changes in temperature, precipitation, winds, and other indicators. Which of the following statements are true in this regard?

• Factors that cause climate change can be divided into three categories, viz., external natural factors, man-made factors and natural internal factors
• The first concrete steps towards controlling climate change came in the form of Montreal Protocol (1991).
• United Nations Climate Change Conference, COP 21 or CMP 11 was held in Nairobi, Kenya
• COP 21 limits average global warming to 2 degrees Fahrenheit above pre-industrial temperatures.

Option 1) Only 1

Option 2) Only 1, 2&3

Option 3) Only 1, 3&4

Option 4) All of these