Challenger Classes ✌️

Ray diagram showing object AB in front of a concave mirror, with Ray 1 and Ray 2 drawn partially.

A student has focussed the image of an object of height 3 cm on a white screen using a concave ..

202The power of a lens is +4D. Find the focal length of this lens. An object is placed at a distance

An object is placed in front of a convex lens of focal length f. If the distance of the object from.

The power of a lens is +4D. Find the focal length of this lens.

An object of 5 cm height is placed at a distance of 20 cm from the optical centre of a concave lens.

What's the Best Way to Draw a Labelled Ray Diagram for Concave Mirror Image Formation

An object is placed in front of a convex mirror at infinity.

When an object is placed beyond 2F of a convex lens, the nature of the image formed is:

A student wants to obtain an erect image of an object using a concave mirror of 10 cm focal length.

Assertion and reason class 10 maths

The teacher while conducting practicals in the laboratory divided the students into three groups..

The distance between the points (0, 2√5) and (–2√5, 0) is

A student took a small amount of copper oxide in a conical flask and added dilute hydrochloric acid.

In what ratio, does x-axis divide the line segment joining the points A(3, 6) and B(–12, –3).

Name the salt formed when sulphuric acid is added to sodium hydroxide and write its pH.

The distance of the point (–6, 8) from origin is

The name of the salt used to remove permanent hardness of water is:

Sodium hydroxide is termed an alkali while Ferric hydroxide is not because:

Acid present in tomato is

When zinc reacts with sodium hydroxide, the product formed is

In the given experimental set-up, if the experiment is carried out separately with each of the .....

You want to test for hardness of water but hard water is not available in the laboratory......

2 g of yellow sulphur powder is burnt in a china dish and the fumes are collected in a test tube.

Select from the following compounds which is not a base

The distance of the point (–1, 7) from x-axis is:

If Q(0, 1) is equidistant from P(5, –3) and R(x, 6), find the values of x.

Show that the points (–2, 3), (8, 3) and (6, 7) are the vertices of a right-angled triangle.

The coordinates of the vertex A of a rectangle ABCD whose three vertices are given as B(0, 0),C(3,0)

Find the ratio in which y-axis divides the line segment joining the points (5, –6) and (–1, –4).

Point P(x, y) is equidistant from points A(5, 1) and B(1, 5). Prove that x = y.

The line segment joining the points A(4, –5) and B(4, 5)divided by the point P such that AP: AB=2:5.

"Class 10 Coordinate Geometry | Assertion Reason PYQ | Circle, Chords & Centre Explained!"

"Which Salt Turns Phenolphthalein Pink? | Class 10 Chemistry MCQ Explained"

Few drops of aqueous solution of ammonium chloride are put on a universal indicator paper.

The distance between the points P (−113,5)(− 311​ ,5) and Q (−23,5)(− 32​ ,5) is:

Fresh milk has a pH of 6. When it changes into curd will its pH increase or decrease? Why?

Find the ratio in which the line segment joining thepoints A(6, 3)and B(−2, −5)is divided by x-axis.

Find the COORDINATES of P and Q in Seconds

Gypsum, Baking Soda vs Baking Powder, Chemical Equations

The point of intersection of the line represented by 3x − y = 3 and y-axis is given by

Select washing soda from the following:

The distance of the point (–6, 8) from x-axis is

"Which pH Value Table is Correct? | Class 10 Science MCQ Explained!"

✅ “Class 10 Chemical Reactions PYQ | Dazzling White Flame Reaction Explained | Board Exam Prep”

Define a double displacement reaction.

✅ “Assertion & Reason Explained: ZnO + C → Zn + CO | Class 10 Science | Redox Reaction & Metallurgy”

2Na(s)+2H 2​ O(l)⟶2NaOH(aq)+H 2​ (g)↑

The balanced chemical equation showing reaction between quicklime and water is:

“Class 10 Chemistry | Why Silver Chloride Turns Grey in Sunlight | Decomposition Reaction "

Potassium Iodide + Lead Nitrate Reaction & Copper Heating Explained

3. In order to balance the following chemical equation, the values of the coefficients x and y .....

If AD and PM are medians of triangles ABC and PQR, respectively where △ABC ~ △PQR.....

D is a point on the side BC of a triangle ABC such that ∠ADC = ∠BAC, prove that CA² = CB · CD.

Which of the following is an example of endothermic process?

✅ Assertion and Reason | Precipitation Reaction | Class 10 Science | Chemical Reactions and Equation

In △ABC, PQ ∥ BC. If PB = 6 cm, AP = 4 cm, AQ = 8 cm, find the length of AC.

In the electrolysis of water, if the mass of the gas collected at the anode is 𝑚𝑎m a​ and.....

the given figure, △ABC ~ △PQR. If AC = 6 cm, BC = 5 cm, QR = 3 cm and PR =x, then the value of x is: